Windows Server 2012 vulnerabilitiesAnd the versions its exploited flaws hit.
Windows Server 2012 is made by Microsoft. We track 3,842 published vulnerabilities in it, across 7 versions. 198 of them are on the list of flaws known to be exploited, the newest added on 8 September 2026. If you run Windows Server 2012, check your version against the exploited flaws below and patch those first.
The most recent Windows Server 2012 flaw added to the known-exploited list is CVE-2026-85880, on 8 September 2026. We keep watching the known-exploited list.
Which versions of Windows Server 2012 do the exploited flaws hit?
Each exploited flaw lists the versions it affects, as published by the vendor. Find your version, then patch.
- CVE-2026-85880Exploited list, 8 Sep 2026
Microsoft Windows Heap-Based Buffer Overflow Vulnerability
r2 - CVE-2026-56155Exploited list, 14 Jul 2026
Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
r2 - CVE-2023-36424Exploited list, 13 Apr 2026
Microsoft Windows Out-of-Bounds Read Vulnerability
r2 - CVE-2025-59287Exploited list, 24 Oct 2025
Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability
r2 - CVE-2025-33073Exploited list, 20 Oct 2025
Microsoft Windows SMB Client Improper Access Control Vulnerability
r2 - CVE-2025-47827Exploited list, 14 Oct 2025
IGEL OS Use of a Key Past its Expiration Date Vulnerability
r2 - CVE-2025-24990Exploited list, 14 Oct 2025
Microsoft Windows Untrusted Pointer Dereference Vulnerability
r2 - CVE-2025-59230Exploited list, 14 Oct 2025
Microsoft Windows Improper Access Control Vulnerability
r2 - CVE-2013-3918Exploited list, 6 Oct 2025
Microsoft Windows Out-of-Bounds Write Vulnerability
r2 - CVE-2021-43226Exploited list, 6 Oct 2025
Microsoft Windows Privilege Escalation Vulnerability
r2 - CVE-2025-33053Exploited list, 10 Jun 2025
Microsoft Windows External Control of File Name or Path Vulnerability
r2 - CVE-2025-30397Exploited list, 13 May 2025
Microsoft Windows Scripting Engine Type Confusion Vulnerability
r2 - CVE-2025-32701Exploited list, 13 May 2025
Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability
r2 - CVE-2025-32706Exploited list, 13 May 2025
Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow Vulnerability
r2 - CVE-2025-32709Exploited list, 13 May 2025
Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
r2 - CVE-2025-24054Exploited list, 17 Apr 2025
Microsoft Windows NTLM Hash Disclosure Spoofing Vulnerability
r2 - CVE-2025-29824Exploited list, 8 Apr 2025
Microsoft Windows Common Log File System (CLFS) Driver Use-After-Free Vulnerability
r2 - CVE-2025-24984Exploited list, 11 Mar 2025
Microsoft Windows NTFS Information Disclosure Vulnerability
r2 - CVE-2025-26633Exploited list, 11 Mar 2025
Microsoft Windows Management Console (MMC) Improper Neutralization Vulnerability
r2 - CVE-2025-24993Exploited list, 11 Mar 2025
Microsoft Windows NTFS Heap-Based Buffer Overflow Vulnerability
r2 - CVE-2025-24985Exploited list, 11 Mar 2025
Microsoft Windows Fast FAT File System Driver Integer Overflow Vulnerability
r2 - CVE-2025-24983Exploited list, 11 Mar 2025
Microsoft Windows Win32k Use-After-Free Vulnerability
r2 - CVE-2025-24991Exploited list, 11 Mar 2025
Microsoft Windows NTFS Out-Of-Bounds Read Vulnerability
r2 - CVE-2018-8639Exploited list, 3 Mar 2025
Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
r2 - CVE-2025-21418Exploited list, 11 Feb 2025
Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability
r2 - CVE-2024-35250Exploited list, 16 Dec 2024
Microsoft Windows Kernel-Mode Driver Untrusted Pointer Dereference Vulnerability
r2 - CVE-2024-49138Exploited list, 10 Dec 2024
Microsoft Windows Common Log File System (CLFS) Driver Heap-Based Buffer Overflow Vulnerability
r2 - CVE-2024-43451Exploited list, 12 Nov 2024
Microsoft Windows NTLMv2 Hash Disclosure Spoofing Vulnerability
r2 - CVE-2024-43573Exploited list, 8 Oct 2024
Microsoft Windows MSHTML Platform Spoofing Vulnerability
r2
1 more exploited flaw names Windows Server 2012 without a version of its own, for example as the system other affected software runs on. It is in the list below.
Showing the 30 most recently added of 198 exploited flaws. The full list is below.
Which Windows Server 2012 vulnerabilities are being exploited?
50 flaws are on the government list of vulnerabilities known to be exploited. These are the ones criminals are using now, so they go first, whatever their severity score says.
- 7.8Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.
- 7.8Microsoft Active Directory Federation Services Insufficient Granularity of Access Control Vulnerability
Microsoft Active Directory Federation Services contains an insufficient granularity of access control vulnerability that allows an authorized attacker to elevate privileges locally.
- 7.8Microsoft Windows Out-of-Bounds Read Vulnerability
Microsoft Windows Common Log File System Driver contains an out-of-bounds read vulnerability that could allow a threat actor for privileges escalation
- 9.8Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability
Microsoft Windows Server Update Service (WSUS) contains a deserialization of untrusted data vulnerability that allows for remote code execution.
- 8.8Microsoft Windows SMB Client Improper Access Control Vulnerability
Microsoft Windows SMB Client contains an improper access control vulnerability that could allow for privilege escalation.
- 4.6IGEL OS Use of a Key Past its Expiration Date Vulnerability
IGEL OS contains a use of a key past its expiration date vulnerability that allows for Secure Boot bypass.
- 7.8Microsoft Windows Untrusted Pointer Dereference Vulnerability
Microsoft Windows Agere Modem Driver contains an untrusted pointer dereference vulnerability that allows for privilege escalation.
- 7.8Microsoft Windows Improper Access Control Vulnerability
Microsoft Windows contains an improper access control vulnerability in Windows Remote Access Connection Manager which could allow an authorized attacker to elevate privileges locally.
Which Windows Server 2012 flaws are most likely to be used?
Ranked by the latest exploit-likelihood forecast: the chance each flaw is used in an attack in the next 30 days. A high severity score on its own doesn't tell you that. Flaws shared by many other makers' products are left out.
- >99%
HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted HTTP requests, aka "HTTP.sys...
- >99%
Apache Struts 2.0.0 through 2.3.15 allows remote attackers to execute arbitrary OGNL expressions via a parameter with a crafted (1) action:, (2) redirect:, or (3) redirectAction: prefix.
- >99%
The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows...
- >99%
Microsoft Office 2007 SP3, Microsoft Office 2010 SP2, Microsoft Office 2013 SP1, Microsoft Office 2016, Microsoft Windows Vista SP2, Windows Server 2008 SP2, Windows 7 SP1, Windows 8.1 allow remote attackers to...
- >99%
The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows...
- >99%
The SMBv1 server in Microsoft Windows Vista SP2; Windows Server 2008 SP2 and R2 SP1; Windows 7 SP1; Windows 8.1; Windows Server 2012 Gold and R2; Windows RT 8.1; and Windows 10 Gold, 1511, and 1607; and Windows...
- 97%CVE-2015-0014Critical
Buffer overflow in the Telnet service in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows...
- 96%CVE-2014-6321Critical
Schannel in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote...
- 95%
Use-after-free vulnerability in Adobe Flash Player before 13.0.0.269 and 14.x through 16.x before 16.0.0.305 on Windows and OS X and before 11.2.202.442 on Linux allows remote attackers to execute arbitrary code via...
- 95%
OleAut32.dll in OLE in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1...
Running Windows Server 2012? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.
- Matched to
- Windows Server 2012 on Acme's software list
- What to do
- Patch first, then check for signs of use
Sent to the alert recipients Acme chose. Also in the app and to Acme's webhook.
We track 3,842 published vulnerabilities listed under the name Windows Server 2012, across 7 versions. The most recent Windows Server 2012 flaw added to the known-exploited list is CVE-2026-85880, on 8 September 2026.
198 are on the list of flaws known to be exploited. The most recently added are CVE-2026-85880, CVE-2026-56155 and CVE-2023-36424.
Each flaw names its own versions, usually as ranges. The newest, CVE-2026-85880, affects r2. The versions for every exploited flaw are listed on this page.
Create a EdgeProtect account and track Windows Server 2012. We match it against every published flaw, give each one a risk score from 0 to 100 and keep watching, so you hear about new ones as soon as we know, by email, in the app or by webhook.