Windows 8.1 vulnerabilitiesAnd the versions its exploited flaws hit.
Windows 8.1 is made by Microsoft. We track 2,876 published vulnerabilities in it, across 2 versions. 149 of them are on the list of flaws known to be exploited, the newest added on 6 October 2025. If you run Windows 8.1, check your version against the exploited flaws below and patch those first.
The most recent Windows 8.1 flaw added to the known-exploited list is CVE-2013-3918, on 6 October 2025. We keep watching the known-exploited list.
Which versions of Windows 8.1 do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "before 6.3.9600.20625" means every version up to, but not including, 6.3.9600.20625. Find your version, then patch.
- CVE-2022-38028Exploited list, 23 Apr 2024
Microsoft Windows Print Spooler Privilege Escalation Vulnerability
before 6.3.9600.20625 - CVE-2016-0165Exploited list, 22 Jun 2023
Microsoft Win32k Privilege Escalation Vulnerability
all versions
28 more exploited flaws name Windows 8.1 without a version of its own, for example as the system other affected software runs on. They are in the list below.
Showing the 30 most recently added of 149 exploited flaws. The full list is below.
Which Windows 8.1 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.
- 8.8Microsoft Windows Out-of-Bounds Write Vulnerability
Microsoft Windows contains an out-of-bounds write vulnerability in the InformationCardSigninHelper Class ActiveX control, icardie.dll.
- 7.8Microsoft Windows Privilege Escalation Vulnerability
Microsoft Windows Common Log File System Driver contains a privilege escalation vulnerability that could allow a local, privileged attacker to bypass certain security mechanisms.
- 7.8Microsoft Windows Win32k Improper Resource Shutdown or Release Vulnerability
Microsoft Windows Win32k contains an improper resource shutdown or release vulnerability that allows for local, authenticated privilege escalation.
- 8.8Microsoft COM for Windows Deserialization of Untrusted Data Vulnerability
Microsoft COM for Windows contains a deserialization of untrusted data vulnerability that allows for privilege escalation and remote code execution via a specially crafted file or script.
- 7.8Microsoft Windows Print Spooler Privilege Escalation Vulnerability
Microsoft Windows Print Spooler service contains a privilege escalation vulnerability.
- 7.8Microsoft Win32k Privilege Escalation Vulnerability
Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation.
- 7.8Microsoft Windows Certificate Dialog Privilege Escalation Vulnerability
Microsoft Windows Certificate Dialog contains a privilege escalation vulnerability, allowing attackers to run processes in an elevated context.
- 7.8Microsoft Windows Print Spooler Privilege Escalation Vulnerability
Microsoft Windows Print Spooler contains an unspecified vulnerability that allows an attacker to gain SYSTEM-level privileges.
Which Windows 8.1 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%
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...
- >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...
- 96%
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...
- 94%
Use-after-free vulnerability in the DisplayObject class in the ActionScript 3 (AS3) implementation in Adobe Flash Player 13.x through 13.0.0.302 on Windows and OS X, 14.x through 18.0.0.203 on Windows and OS X, 11.x...
- 93%
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...
Running Windows 8.1? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Microsoft Windows contains an out-of-bounds write vulnerability in the InformationCardSigninHelper Class ActiveX control, icardie.dll. An attacker could exploit the vulnerability by constructing a specially crafted webpage. When a user views the webpage, the vulnerability could allow remote code execution. An attacker who successfully exploited this vulnerability could gain the same user rights as the current user. The impacted product could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.
- Matched to
- Windows 8.1 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 2,876 published vulnerabilities listed under the name Windows 8.1, across 2 versions. The most recent Windows 8.1 flaw added to the known-exploited list is CVE-2013-3918, on 6 October 2025.
149 are on the list of flaws known to be exploited. The most recently added are CVE-2013-3918, CVE-2021-43226 and CVE-2018-8639.
Each flaw names its own versions, usually as ranges. The newest, CVE-2022-38028, affects before 6.3.9600.20625. The versions for every exploited flaw are listed on this page.
Create a EdgeProtect account and track Windows 8.1. 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.