CVE-2026-97788 Active Directory Federation Services (AD FS) Information Disclosure Vulnerability

What is CVE-2026-97788?

CVE-2026-97788 is a high-severity vulnerability in Microsoft .Net Framework, published on 13 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Observable discrepancy in Active Directory Federation Services (AD FS) allows an unauthorized attacker to disclose information over a network.

Weakness: CWE-203

Which versions are affected by CVE-2026-97788?

It affects 15 products.

Products include Microsoft .Net Framework, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2 and 9 more.

How do I fix CVE-2026-97788?

No fix has been published for CVE-2026-97788 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-97788 being exploited?

There is no known exploitation of CVE-2026-97788 in the wild and no public exploit code.

Other vulnerabilities in Microsoft .Net Framework

• CVE-2020-0646 Microsoft .NET Framework Remote Code Execution Exploited Critical 9.8
• CVE-2017-8759 Microsoft .NET Framework Remote Code Execution Exploited High 7.8
• CVE-2015-1671 Microsoft Windows Remote Code Execution Exploited High 7.8
• CVE-2024-29059 Microsoft .NET Framework Information Disclosure Exploited High 7.5
• CVE-2014-4073 Privilege escalation in n/a Critical 10.0

All Microsoft .Net Framework vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-45q6-m2jc-mwfv.