Jul 2026: Windows Active Directory Federation Services Denial of Service Vulnerability
CVE-2026-50355 Published on July 14, 2026

Windows Active Directory Federation Services Denial of Service Vulnerability
Stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network.

Vendor Advisory NVD

Weakness Type

What is a Stack Overflow Vulnerability?

A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).

CVE-2026-50355 has been classified to as a Stack Overflow vulnerability or weakness.

Products Associated with CVE-2026-50355

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Microsoft Windows 10

Microsoft Windows Server 2019

Microsoft Windows Server 2022

Microsoft Windows Server 2025

Microsoft Windows Server 2016

Microsoft Windows Server 2012

Microsoft Windows Server 2012 R2

Microsoft Net

Microsoft .NET Framework

Affected Versions

Microsoft .NET Framework 3.5 AND 4.7.2:

Version 4.7.0 and below 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0 is affected.

Microsoft .NET Framework 3.5 AND 4.8:

Version 4.8.0 and below 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0 is affected.

Microsoft .NET Framework 3.5 AND 4.8.1:

Version 4.8.1 and below 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 is affected.

Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2:

Version 4.7.0 and below 4.7.4143.0 is affected.

Microsoft .NET Framework 4.8:

Version 4.8.0 and below 4.8.4803.0 is affected.

Microsoft .NET Framework 4.8.1:

Version 4.8.0.0 and below 4.8.9340.0 is affected.

Microsoft Windows 10 Version 1607:

Version 10.0.14393.0 and below 10.0.14393.9339 is affected.

Microsoft Windows 10 Version 1809:

Version 10.0.17763.0 and below 10.0.17763.9020 is affected.

Microsoft Windows Server 2012:

Version 6.2.9200.0 and below 6.2.9200.26226 is affected.

Microsoft Windows Server 2012 (Server Core installation):

Version 6.2.9200.0 and below 6.2.9200.26226 is affected.

Microsoft Windows Server 2012 R2:

Version 6.3.9600.0 and below 6.3.9600.23291 is affected.

Microsoft Windows Server 2012 R2 (Server Core installation):

Version 6.3.9600.0 and below 6.3.9600.23291 is affected.

Microsoft Windows Server 2016:

Version 10.0.14393.0 and below 10.0.14393.9339 is affected.

Microsoft Windows Server 2016 (Server Core installation):

Version 10.0.14393.0 and below 10.0.14393.9339 is affected.

Microsoft Windows Server 2019:

Version 10.0.17763.0 and below 10.0.17763.9020 is affected.

Microsoft Windows Server 2019 (Server Core installation):

Version 10.0.17763.0 and below 10.0.17763.9020 is affected.

Microsoft Windows Server 2022:

Version 10.0.20348.0 and below 10.0.20348.5386 is affected.

Microsoft Windows Server 2025:

Version 10.0.26100.0 and below 10.0.26100.33158 is affected.

Microsoft Windows Server 2025 (Server Core installation):

Version 10.0.26100.0 and below 10.0.26100.33158 is affected.

Jul 2026: Windows Active Directory Federation Services Denial of Service VulnerabilityCVE-2026-50355 Published on July 14, 2026

Weakness Type

What is a Stack Overflow Vulnerability?

Products Associated with CVE-2026-50355

Affected Versions

Jul 2026: Windows Active Directory Federation Services Denial of Service Vulnerability
CVE-2026-50355 Published on July 14, 2026