CVE-2026-108131 Active Directory Federation Services (AD FS) Spoofing Vulnerability
An unauthorized attacker can perform spoofing attacks against Active Directory Federation Services, requiring immediate patching by Windows administrators.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-108131?
CVE-2026-108131 is a high-severity vulnerability in Microsoft Windows 10 Version 1607, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
No cwe for this issue in Active Directory Federation Services (AD FS) allows an unauthorized attacker to perform spoofing over a network.
Which versions are affected by CVE-2026-108131?
How do I fix CVE-2026-108131?
No fix has been published for CVE-2026-108131 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-108131 being exploited?
There is no known exploitation of CVE-2026-108131 in the wild and no public exploit code.
Sources
Also known as GHSA-fhqq-2fpf-qcf9.