CVE-2026-69982: Active Directory Federation Services (AD FS) Security Feature Bypass Vulnerability
Active Directory Federation Services (AD FS) Security Feature Bypass Vulnerability
Other sources
Weak authentication in Active Directory Federation Services (AD FS) allows an unauthorized attacker to bypass a security feature over a network.
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.3.9600.23470Patch KB5126836 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.17763.9376Patch KB5126651 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.14393.9612Patch KB5126868 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.33650Patch KB5126646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.20348.5761Patch KB5126655
Event History
Frequently Asked Questions
What access does an attacker need to attempt exploitation?
The vulnerability can be exploited over a network by an unauthorized attacker. It does not require prior privileges or user interaction, but exploitation has high attack complexity.
What is the expected impact if exploitation succeeds?
Successful exploitation can compromise integrity by allowing a security feature bypass. The provided severity metrics indicate no confidentiality or availability impact.
Which environments should be reviewed?
Review AD FS deployments on the listed Microsoft Windows platforms: Windows 10; Windows Server 2012 R2, 2016, 2019, 2022, and 2025. Microsoft Active Directory Federation Services is also listed as affected software.