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Hafnium Exchange 2010 Patch

HAFNIUM patching exchange 2010 - Spicework

HAFNIUM Exploit: Microsoft veröffentlicht Updates für

Hafnium: Microsoft Exchange Sicherheitsupdate - Der

Download Update Rollup 32 for Exchange Server 2010 SP3 (KB5000978) Update detail information for Exchange Server 2010 SP3 Installation instructions for Exchange Server 2010 SP3. Learn more about how to install the latest update rollup for Exchange Server 2010. Also, learn about the following update installation scenarios Patches for Exchange Servers 2010, 2013, 2016 and 2019 can be downloaded here. Microsoft attributes Hafnium to a state-sponsored Chinese group. But security vendors have identified several clusters..

Microsoft releases a one-click patch for its critical

  1. Den Patch gibt es auch für den eigentlich nicht mehr supporteten Exchange 2010. Der Patch wird auch im WSUS angezeigt. Antworten. Daniel sagt: 9. März 2021 um 18:02 Unser Microsoft Account Manager hat uns am Morgen des 4. März direkt angeschrieben und sich erkundigt, ob wir Unterstützung benötigen (Ihr Microsoft Account Team und die Support-Teams wurden vollständig mobilisiert. Bitte.
  2. Hafnium-Exploits: Lücken in Exchange Server werden für Spionage genutzt. Microsoft schließt per Patch kritische Lücken in Exchange Server 2019, 2016, 2013 und 2010, die dem Unternehmen zufolge.
  3. Install Patches for Exchange 2010, 2013, 2016, and 2019 ASAP. Updated March 16. On March 2, the Microsoft Threat Intelligence Center (MSTIC) issued details of multiple day-zero exploits in active use against on-premises Exchange servers. As described in their blog, attackers used these vulnerabilities to access on-premises Exchange servers which enabled access to email accounts, and allowed.
  4. Update [03/04/2021]: The Exchange Server team released a script for checking HAFNIUM indicators of compromise (IOCs). See Scan Exchange log files for indicators of compromise. Microsoft has detected multiple 0-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks. In the attacks observed, the threat actor used these vulnerabilities.
  5. Zum 3. März 2021 (2.3. in den USA) veröffentlichte Microsoft ja einen außerplanmäßigen Patch für Microsoft Exchange Server (2010 bis 2019), um vier -Day-Schwachstellen zu schließen. Gleichzeitig gab es eine Warnung, nun zeitnah zu patchen, da vereinzelte Angriffe auf ausgesuchte Ziele bemerkt worden seien. Ich hatte im Blog-Beitrag Exchange-Server -day-Exploits werden aktiv ausgenutzt.
  6. These patches respond to a group of vulnerabilities known to impact Exchange 2013, 2016, and 2019. It is important to note that an Exchange 2010 security update has also been issued, though the CVEs do not reference that version as being vulnerable

HAFNIUM and EX2010 - Microsoft Q&

  1. Task One - Patch the Server If you suspect your organization might be vulnerable to this exploit as you're running an on-prem Exchange server (2010, 2013, 2016, 2019), the first thing to do is patch the server. If unsure about your patch status, run this Nmap script by Kevin Beaumont to check for the CVEs using Outlook Web App path dat
  2. istratoren von On-PremisesMicrosoft Exchange-Servern sollten dringen reagieren und die zum 2
  3. Patch now! Exchange servers attacked by Hafnium zero-days. Microsoft has released updates to deal with 4 zero-day vulnerabilities being used in an attack chain aimed at users of Exchange Server. Microsoft has detected multiple zero-day exploits being used to attack on-premises versions of Microsoft Exchange Server in limited and targeted attacks
  4. The new security updates available from the Microsoft Download Center just address the Hafnium Exchange Server vulnerabilities, which are listed as CVE-2021-26855, CVE-2021-26857, CVE-2021-26858.
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Aktuelle Bedrohung Hafnium – Was nun zu tun ist

Exchange On Prem 0 day for all versions 2010+. Exchange Online not vulnerable, but even a single on prem box means a customer could be at risk. March 2, 20212 - Exchange Out of Band Release - Multiple Security Updates Released for Exchange Server - HAFNIUM targeting Exchange Servers with 0-day exploits. Exchange Team Blog The update fixes Exchange Server 2013, 2016 and 2019. There is also a Defense in Depth update for Exchange Server 2010 with Service Pack 3. There is also a Defense in Depth update for Exchange. Microsoft Exchange and security experts answer the top seven questions around compromise and mitigation for the HAFNIUM Exchange Server 2010, 2013, 2016, and 2019 exploits. The Q&A was pulled from an intense, hour-long panel discussion that covers this topic in-depth Hafnium: Microsoft Exchange-Sicherheitsupdate zum Schutz vor neuen nationalstaatlichen Attacken verfügbar. Wir möchten Sie auf die heute veröffentlichte Microsoft-Meldung in Bezug auf den, aus China agierenden, Bedrohungsakteur Hafnium hinweisen. Microsoft rät dringend dazu, Ihre on-premises Exchange Server zu patchen

Kritische Sicherheitslücken in Exchange Server 2010, 2013, 2016 & 2019 (HAFNIUM) 4. März 2021. Der Hersteller Microsoft hat aktuell mehrere Sicherheitslücken in den Exchange Server Versionen 2010, 2013, 2016 und 2019 identifiziert, die bereits aktiv ausgenutzt werden. Die Schwachstellen mit den Bezeichnungen CVE-2021-26855, CVE-2021-26857. Kürzlich wurden mehrere Sicherheitslücken in Microsoft Exchange Server-Produkten entdeckt, die von Angreifern ausgenutzt werden können, um sich Zugang zu einem Exchange-Server zu verschaffen. Dieser Exploit ist unter dem Namen Hafnium bekannt und kann auch als Einfallstor genutzt werden, um tiefer in das Unternehmensnetzwerk einzudringen, da die Exchange Server oft öffentlich zugänglich. There is a possibility that Microsoft Exchange Server 2010 may also be vulnerable. This version is NOT protected by the four vulnerability patches issued by Microsoft listed above. Microsoft has provided defense-in-depth guidance for organizations running Exchange 2010. Fortinet Protections. The FortiGuard Labs team was immediately contacted by Microsoft concerning these vulnerabilities.

Hafnium: Sicherheitsupdates jetzt installieren Microsoft

Microsoft Exchange: One-Click-Tool soll die

  1. Exchange 2019 is also at risk. Exchange 2010 does not have the same vulnerabilities as the other versions, but it is receiving patches as a defense-in-depth measure. Older versions of Exchange.
  2. Announced today, Microsoft has released a 'one-click' tool that is able to patch Exchange Server 2013, 2016, and 2019 deployments.The company says that this tool is designed as an interim.
  3. Microsoft on Tuesday announced the release of a one-click tool to apply temporary security protections against the recent Exchange Server attacks from the Hafnium advanced persistent threat.
  4. Everything you need to know about the Microsoft Exchange Server hack. Updated: Vulnerabilities are being exploited by Hafnium. Other cyberattackers are following suit
  5. Exchange Server 2010 (update requires SP 3 or any SP 3 RU - this is a Defense in Depth update) Exchange Server 2013 (update requires CU 23) Exchange Server 2016 (update requires CU 19 or CU 18.
  6. d that services will become in disabled state during installation and it.
  7. The vulnerabilities affect Exchange Server versions 2013, 2016, and 2019, while Exchange Server 2010 is also being updated for defense-in-depth purposes. Exchange Online is not affected. CVE Details: CVE. Description. Impact. CVE-2021-26855: server-side request forgery (SSRF) vulnerability in Exchange which allowed the attacker to send arbitrary HTTP requests and authenticate as the Exchange.

Hafnium: Spionage in Microsoft Exchange. Mo 15.03.2021 - 08:00 Uhr. von Cornelia Lehle, Sales Director G DATA Schweiz. Microsoft hat Patches für insgesamt vier hochkritische Sicherheitslücken bereitgestellt. Diese Lücken in Microsoft Exchange ermöglichen Cyberkriminellen den direkten Zugriff auf Unternehmensdaten - ohne Passwörter HAFNIUM Targeting Exchange Servers with 0-Day Exploits. Microsoft released patches for multiple different on-premises Microsoft Exchange Server zero-day vulnerabilities that are being exploited by a nation-state-affiliated group. The vulnerabilities exist in on-premises Exchange Servers 2010, 2013, 2016, and 2019 Exchange Server 2010 (RU 31 for Service Pack 3) Exchange Server 2013 (CU 23) Exchange Server 2016 (CU 19, CU 18) Exchange Server 2019 (CU 8, CU 7) Nicht betroffen. Exchange Cloud Service; Prüfscript. Microsoft hat ein Script zur Verfügung gestellt, mit dem Administratoren die Anfälligkeit des Exchange Servers prüfen können. Das Script wird mit Administrationsrechten auf dem Exchangeserver. Update 3/11: The following OSQuery detects active commands being run through webshells observed used by actors on compromised Exchange servers. While systems may have been patched to defend against Hafnium and others, threat actors may have leveraged these vulnerabilities to establish additional persistence in victim networks Update Rollup 32 for Exchange Server 2010 Service Pack 3 (SP3) resolves issues that were found in Exchange Server 2010 SP3 RU29 since the software was released Do i still need to update our exchange even we do not have any role up installed and is it going to install this role up because we do not have role up installed. Thank

Hafnium Exploits Exchange Server Vulnerability of European Banking Authority. According to SecurityWeek, the European Banking Authority, a key EU financial regulator, says it has fallen victim to a hack of its Microsoft email system which the US company blames on a Chinese group. Microsoft said last week that a state-sponsored group operating. SentinelOne and HAFNIUM / Microsoft Exchange 0-days - SentinelOne. On Tuesday, March 2nd, Microsoft released an out-of-band security update addressing a total of 7 CVEs, four of which are associated with ongoing, targeted attacks. The update was in response to an active campaign that was seen on Microsoft clients compromising Exchange servers. EMERGENCY PATCH BATCH — Microsoft issues emergency patches for 4 exploited 0-days in Exchange Attacks are limited for now but may ramp up as other hackers learn of them

Microsoft hat einige Notfall-Updates veröffentlicht, die vier Zero-Day-Lücken in den Microsoft Exchange Server-Versionen 2013, 2016 und 2019 schließen sollen Microsoft released patches for four vulnerabilities in Exchange Server on March 2, disclosing that these vulnerabilities were being exploited by a previously unknown threat actor, referred to as HAFNIUM.. The vulnerabilities in question — CVE-2021-26855, CVE-2021-26857, CVE-2021-26858 and CVE-2021-27065 — affect Microsoft Exchange Server 2019, 2016, 2013 and the out-of-support Microsoft.

Exchange hack: what action companies need to take now

Unless you have been living under a rock for the last week, you could not have missed that the Microsoft 365 world has been abuzz with worry after Exchange Server 2010-2019 succumbed to zero-day. [UPDATE] March 8, 2021 - Since original publication of this blog, Volexity has now observed that cyber espionage operations using the SSRF vulnerability CVE-2021-26855 started occurring on January 3, 2021, three days earlier than initially posted. Volexity is seeing active in-the-wild exploitation of multiple Microsoft Exchange vulnerabilities used to steal e-mail and compromise networks

Updates für Exchange 2010 - MSXFA

Microsoft: These Exchange Server zero-day flaws are being used by hackers, so update now. Hafnium state-sponsored threat actor was exploiting four previously unknown flaws in Exchange servers Updates are available for : Exchange 2019 CU8. Exchange 2019 CU7. Exchange 2016 CU19. Exchange 2016 CU18. Exchange 2013 CU23. Exchange 2010 SP3, RU32. Please note that the security updates are CU specific. Also, Security Updates are cumulative, so this security update contains previous security updates as well Hafnium and what to do about the latest microsoft exchange vulnerabilities. microsoft is now urging users to download software patches, or fixes, for the four different vulnerabilities that were found. the company said that it believes the attacks were carried out by hafnium, a group assessed to be state sponsored and operating out of china.. Hafnium targeting exchange servers with 0 day. What do I need to do? Read over Microsoft's Security post here: HAFNIUM targeting Exchange Servers with 0-day exploits. Read over our Reddit Thread and Huntress Blog that gives our details on what to look for--we will continue updating them as we have more information.. Make sure you have the latest Exchange Server updates. For Exchange 2013, 2016, 2019 refer to KB5000871 and for Exchange 2010.

Exchange 2010 14.3.123.4 = Microsoft Exchange Server 2010 SP3. Exchange 2013 15..620.29 = Exchange Server 2013 Cumulative Update 1 (CU1) 15..712.24 = Exchange Server 2013 Cumulative Update 2 (CU2) 15..775.38 = Exchange Server 2013 Cumulative Update 3 (CU3) 15..847.32 = Exchange Server 2013 Service Pack 1 (CU4) 15..913.22 = Exchange Server 2013 Cumulative Update 5 (CU5) 15..995.29. • Exchange Server 2010 (update requires Service Pack 3 - this is a Defense in Depth update) • Exchange Server 2013 (update requires CU 23, CU 22, CU 21 or SP1) • Exchange Server 2016 (update requires CU 19, CU 18, CU 17, CU 16, CU 15, CU 14, CU13, CU 12, CU 11, CU 10, CU 9 or CU 8) • Exchange Server 2019 (update requires CU 8, CU 7, CU 6, CU 5, CU 4, CU 3, CU 2, CU 1 or RTM) You need. This threat affects users of Microsoft Exchange Server versions 2010, 2013, 2016, and 2019; Details. After exploiting vulnerabilities to gain initial access, HAFNIUM operators deployed webshells on the compromised server. Webshells potentially allow attackers to steal data and perform additional malicious actions that lead to further compromise. For more details see ESET Customer Advisory.

Hafnium: Microsoft Exchange und der Weg zur Heilun

Further, the patch will only fix the Exchange Server vulnerabilities — those already compromised will still have to remove the backdoor the group planted in their systems. Hafnium is exploiting. Von Inés Atug, Markus Drenger und Daniel Jedecke. Nach der Veröffentlichung des Out-of-Band-Patches für die als HAFNIUM bekannt gewordenen Schwachstellen in Exchange Servern haben viele Admins, die zuvor eine Migration nach Office 365 (jetzt Microsoft 365) durchgeführt hatten, aufgeatmet. Denn Microsoft zufolge ist Exchange Online von Hafnium nicht betroffen The Windows giant today issued patches for Exchange to close up the bugs, and recommended their immediate application by all. On-prem and hosted Exchange, from version 2013 to 2019, are vulnerable and need fixing up. Microsoft's corporate veep for customer security and trust Tom Burt named the miscreants Hafnium, said they operate in China though use US-based servers, and classified. Zero day vulnerability on your Exchange servers. PATCH NOW!!! Exchange 2019 and Exchange 2016, run the latest RU and then apply the Security update or check for windows updates Exchange 2010..

HAFNIUM: EOMT von Microsoft sichert ungepatchte Exchange

  1. Multiple Security Updates Released for Exchange Server - Microsoft Security Response Center. Description of the security update for Microsoft Exchange Server 2019, 2016, and 2013: March 2, 2021 (KB5000871) HAFNIUM targeting Exchange Servers with 0-day exploits - Microsoft Securit
  2. At this point, the message should be clear that anyone who installed a local Microsoft Exchange Server (2010, 2013, 2016, or 2019) needs to patch and scan, but we're only beginning to understand.
  3. Sie können Update Rollup 2 für Exchange Server 2010 SP3 nicht auf einer DBCS-Version (Double-Byte Character Set) von Windows Server 2012 installieren oder deinstallieren, wenn die Spracheinstellung für Nicht-Unicode-Programme auf die Standardsprache festgelegt ist. Um dieses Problem zu umgehen, müssen Sie diese Einstellung zunächst ändern. Führen Sie hierzu die folgenden Schritte aus
  4. Promptly applying today's patches is the best protection against this attack. As a further precaution, Microsoft is releasing a patch for Microsoft Exchange Server 2010 to help mitigate the threat. Microsoft Defender, the company's free antivirus, has also been updated to detect Hafnium's malware tools
  5. Microsoft fixes actively exploited Exchange zero-day bugs, patch now. By. Lawrence Abrams. March 2, 2021. 05:18 PM. 5. Microsoft has released emergency out-of-band security updates for all.
  6. imieren, empfehlen wir, unverzüglich die folgenden drei Schritte durchzuführen: Patches für Exchange-Umgebungen installieren: Um die Schwachstellen zu beheben, sollten Sie auf die neuesten Exchange Cumulative Updates.
  7. Exchange Server 2010 (update requires SP 3 or any SP 3 RU - this is a Defense-in-Depth update) Exchange Server 2013 (update requires CU 23) Exchange Server 2016 (update requires CU 19 or CU 18) Exchange Server 2019 (update requires CU 8 or CU 7) (Updated March 4, 2021): If you are running an older CU than what the patch will accept, you must.

Der Hafnium Exchange-Server-Hack: Anatomie einer

Customer must be on Exchange 2010 SP3 to receive updates. As previously discussed, Exchange 2010 transitioned out of support on the 13th of October 2020. Note this was an extension of the original date, January 14th 2020. This release is after the end of support to resolve the below security issue. CVE-2021-26857 . Issues Resolved. This is a. MSTIC attributes this campaign to HAFNIUM, a group assessed to be state-sponsored and operating out of China. Rapid7 detection and response teams have also observed increased threat activity against Microsoft Exchange Server since Feb. 27, 2021, and can confirm ongoing mass exploitation of vulnerable Exchange instances. Microsoft Exchange customers should apply the latest updates on an. HAFNIUM targeting Exchange Servers with 0-day exploits. Multiple Security Updates Released for Exchange Server. Microsoft Exchange Server Vulnerabilities Mitigations. March 2021 Exchange Server Security Updates for older Cumulative Updates of Exchange Server. FireEye. Detection and Response to Exploitation of Microsoft Exchange Zero-Day. Exchange Server 2010 is no longer supported, but the software giant made a defense in depth exception and gave Server 2010 users a freebie patch, too. That means the vulnerabilities the. On March 2nd, Microsoft released out-of-band emergency security updates to fix four zero-day vulnerabilities actively used in attacks against Microsoft Exchange. These vulnerabilities are tracked.

Hafnium on Exchange 2010, and what about private key auth

Sicherheitslücken im Exchange-Server ziehen derzeit Angriffe auf sich. Microsoft stellt ein Skript bereit, mit dem Administratoren ihre Systeme prüfen können Microsoft explains that self-hosted servers running Exchange Server 2013, 2016, or 2019 are at risk and should download its security patch as a matter of urgency. If your organization uses. Microsoft has released an updated script that scans Exchange log files for indicators of compromise (IOCs) associated with the vulnerabilities disclosed on March 2, 2021.. CISA is aware of widespread domestic and international exploitation of these vulnerabilities and strongly recommends organizations run the Test-ProxyLogon.ps1 script—as soon as possible—to help determine whether their. Microsoft Exchange Server 2010 (SP 3 RU) Microsoft Exchange Server 2013 (CU 23) Microsoft Exchange Server 2016 (CU 19, CU 18) Microsoft Exchange Server 2019 (CU 8, CU 7) Wenn Sie einen Mailserver mit einer der genannten Versionen betreiben, besteht Handlungsbedarf. Sprechen Sie hierzu ggf. mit Ihrem IT-Betreuer

Am 2. März hat Microsoft in seinem Security-Blogbeitrag HAFNIUM targeting Exchange Servers with 0-day exploits bekannt gegeben, dass vier gravierende Schwachstellen in Microsoft Exchange-Servern aktiv ausgenutzt werden und daraufhin Updates bereitgestellt. Tätern ermöglicht die Kombination der vier Schwachstellen (CVE-2021-26855, CVE-2021-26857, CVE-2021-26858, CVE-2021-27065. The company released patches for the 2010, 2013, 2016 and 2019 versions of Exchange. Generally, Microsoft releases updates on Patch Tuesday, which occurs on the second Tuesday of each month, but. Patch your Exchange servers. As we mentioned above, these security holes are already being actively exploited by more than just the Hafnium gang. Search your networks for indicators of compromise Four zero-day vulnerabilities are being leveraged by the Hafnium threat actor to pop Microsoft Exchange Servers: CVE-2021-26855, a server-side request forgery (SSRF) vulnerability in Exchange that.

Mit Updates außer der Reihe beseitigt Microsoft mehrere 0-Day-Lücken in Exchange Server. Hacker sollen sie bereits für gezielte Angriffe auf Mail-Server nutzen Obviously, the previously stated advice to update those on-premises Exchange servers now remains the best mitigation option. Even White House press secretary Jen Psaki warned, on March 5, that. Exchange Server 2010 (update requires SP 3 or any SP 3 RU - this is a Defense in Depth update) Exchange Server 2013 (update requires CU 23) Exchange Server 2016 (update requires CU 19 or CU 18) Exchange Server 2019 (update requires CU 8 or CU 7) NEW! Security Updates for older Cumulative Updates of Exchange Server; Update # 4 - [16.03.2021. by Joe Panettieri • Apr 22, 2021. A Microsoft Exchange Server cyberattack and email hack apparently impacted thousands of on-premises email customers, small businesses, enterprises and government organizations worldwide.. The following links summarize steps that MSPs and MSSPs can take to patch Exchange Server for customers. But patching is not enough to kick hackers out of compromised. Microsoft Shares IOC Scan Tool, as Attacks on Exchange Servers Expand ASPR urges healthcare entities to patch critical flaws in some Exchange servers as attacks and exploits increase

Hafnium Exploit - MSXFAQ - Exchange, Skype for Business

Out of Band Critical Exchange Security Updates-March 2021. Posted on 2nd March 2021 by Rhoderick Milne [MSFT] Security updates were released today for Exchange 2010, 2013, 2016 and 2019. Attacks were detected which leveraged these vulnerabilities, so an out of band set of updates was released. This Von Inés Atug, Markus Drenger und Daniel Jedecke. Nach der Veröffentlichung des Out-of-Band-Patches für die als HAFNIUM bekannt gewordenen Schwachstellen in Exchange Servern haben viele Admins, die zuvor eine Migration nach Office 365 (jetzt Microsoft 365) durchgeführt hatten, aufgeatmet. Denn Microsoft zufolge ist Exchange Online von Hafnium nicht betroffen Exchange servers under siege from at least 10 APT groups. Microsoft has rushed out emergency updates to address four zero-day flaws affecting Microsoft Exchange Server versions 2013, 2016, and. Security Update for Microsoft Exchange Server 2010 SP 3 (March 2021) Version Check: Identify vulnerable Exchange Server 2010 systems. Security Updates for Microsoft Exchange Server (March 2021) Version Check: Identify vulnerable Exchange Server 2013, 2016 and 2019 systems. Microsoft Exchange Server Authentication Bypass: Direct Chec

The actions below are recommended to be carried out by IT and Security teams for organisations running Exchange 2003, 2007, 2010, 2013, 2016 and 2019. (Exchange Online is not affected.) Install the software patch released by Microsoft that must be installed as a privileged user (older versions need to follow a different upgrade path However, Microsoft were still providing patches to Exchange Server 2010 as a precaution. If you patched on the 2nd of March 2021 you only need to be concerned with identifying the HAFNIUM threat actor, if you patched after this date other threat actor may have abused the vulnerabilities in your Exchange Server(s). [UPDATED 10/03/21] Praetorian have provided details on how to reverse three. ***please read the documentation in the links below for more info on remediation*** Let's talk about the Exchange Server 0-Day exploits announced on March 2.

Detecting HAFNIUM and Exchange Zero-Day Activity. By. BalaGanesh. -. March 8, 2021. 0. The Chinese hacking group, which Microsoft calls Hafnium, appears to have been breaking into private and government computer networks through the company's popular Exchange email software for a number of months Exchange Server 2010 (update requires Service Pack 3 - this is a Defense in Depth update) Exchange Server 2013 (update requires CU 23) Exchange Server 2016 (update requires CU 19 or CU 18) Exchange Server 2019 (update requires CU 8 or CU 7) 3. Put your servers on maintenance mode if you can, otherwise you should consider a maintenance window. In addition, the security updates are also available for Microsoft Exchange Server 2010, which is no longer supported. IV. Related Information Information that explains the details of the observed attacks has been released by Microsoft and others. In addition to the details of the exploited vulnerabilities, the Microsoft's blog provides information on activities confirmed in the attack.

White House Responds to China's Hafnium Attack on Microsoft Exchange Servers. Hundreds of thousands of Microsoft customers are vulnerable to foreign actors, believed to be China cybercriminals identified as HAFNIUM, as Microsoft Exchange Servers are exploited. From March 3 through 5, Microsoft has been issuing security updates for their. Microsoft heeft vier zeroday-kwetsbaarheden gedicht in Exchange Server. Die zouden misbruikt zijn door Chinese spionnen om data te stelen van Amerikaanse defensie-aannemers, advocatenkantoren en. SecurityHQ Investigates HAFNIUM Compromise of Microsoft Exchange Servers - 10 March 2021. On 2nd March 2021, Microsoft disclosed details of four zero-day vulnerabilities that had been used by the threat actor known as HAFNIUM to target Microsoft Exchange servers. HAFNIUM are linked to the People's Republic of China (PRC) Microsoft: These Exchange Server zero-day flaws are being used by hackers, so update now. Microsoft has released updates to address four previously unknown or 'zero-day' vulnerabilities in.

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