Windows 11 25H2 vulnerabilitiesAnd the versions its exploited flaws hit.
Windows 11 25H2 is made by Microsoft. We track 108 published vulnerabilities in it, across 5 versions. 4 of them are on the list of flaws known to be exploited, the newest added on 8 September 2026. If you run Windows 11 25H2, check your version against the exploited flaws below and patch those first.
The most recent Windows 11 25H2 flaw added to the known-exploited list is CVE-2026-81963, on 8 September 2026. We keep watching the known-exploited list.
Which versions of Windows 11 25H2 do the exploited flaws hit?
Each exploited flaw lists the versions it affects, usually as ranges. "before 10.0.26200.9445" means every version up to, but not including, 10.0.26200.9445. Find your version, then patch.
- CVE-2026-81963Exploited list, 8 Sep 2026
Microsoft Windows Link Following Vulnerability
before 10.0.26200.9445 - CVE-2025-24990Exploited list, 14 Oct 2025
Microsoft Windows Untrusted Pointer Dereference Vulnerability
before 10.0.26200.6899 - CVE-2025-47827Exploited list, 14 Oct 2025
IGEL OS Use of a Key Past its Expiration Date Vulnerability
before 10.0.26200.6899 - CVE-2025-59230Exploited list, 14 Oct 2025
Microsoft Windows Improper Access Control Vulnerability
before 10.0.26200.6899
Which Windows 11 25H2 vulnerabilities are being exploited?
4 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 Link Following Vulnerability
Microsoft Windows Update Stack contains a link following vulnerability that allows a local attacker to escalate privileges locally up to SYSTEM.
- 7.8Microsoft Windows Untrusted Pointer Dereference Vulnerability
Microsoft Windows Agere Modem Driver contains an untrusted pointer dereference vulnerability that allows 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 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 11 25H2 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.
- 6.4%
Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems.
- 5.4%CVE-2025-55681High
Out-of-bounds read in Windows DWM allows an authorized attacker to elevate privileges locally.
- 4.9%
In IGEL OS before 11, Secure Boot can be bypassed because the igel-flash-driver module improperly verifies a cryptographic signature.
- 4.2%CVE-2025-59199High
Improper access control in Software Protection Platform (SPP) allows an authorized attacker to elevate privileges locally.
- 3.4%CVE-2025-55692High
Improper input validation in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
- 3.1%CVE-2025-55338Medium
Missing Ability to Patch ROM Code in Windows BitLocker allows an unauthorized attacker to bypass a security feature with a physical attack.
- 3.0%CVE-2025-55694High
Improper access control in Windows Error Reporting allows an authorized attacker to elevate privileges locally.
- 2.7%CVE-2025-59194High
Use of uninitialized resource in Windows Kernel allows an authorized attacker to elevate privileges locally.
- 2.7%
Improper access control in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges locally.
- 2.5%CVE-2025-24052High
Microsoft is aware of vulnerabilities in the third party Agere Modem driver that ships natively with supported Windows operating systems.
Running Windows 11 25H2? We'll keep checking.
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1 flaw being exploited affects software Acme tracks
Microsoft Windows Update Stack contains a link following vulnerability that allows a local attacker to escalate privileges locally up to SYSTEM.
- Matched to
- Windows 11 25H2 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 108 published vulnerabilities listed under the name Windows 11 25H2, across 5 versions. The most recent Windows 11 25H2 flaw added to the known-exploited list is CVE-2026-81963, on 8 September 2026.
4 are on the list of flaws known to be exploited. The most recently added are CVE-2026-81963, CVE-2025-24990 and CVE-2025-47827.
Each flaw names its own versions, usually as ranges. The newest, CVE-2026-81963, affects before 10.0.26200.9445. The versions for every exploited flaw are listed on this page.
Create a Precursor Intelligence account and track Windows 11 25H2. 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.