CVE-2026-50368: Windows Active Directory Federation Services Denial of Service Vulnerability
Published Jul 14, 2026
·Updated
Stack-based buffer overflow in Active Directory Federation Services allows an unauthorized attacker to deny service over a network.
Other sources
Windows Active Directory Federation Services Denial of Service Vulnerability
— Microsoft
Affected Software
94 affected componentsFixes available
Microsoft Windows Server 2012<6.2.9200.26226
6.2.9200.26226
Microsoft Windows Server 2012 R2<6.3.9600.23291
6.3.9600.23291
Microsoft Windows Server 2012<6.2.9200.26226
6.2.9200.26226
Microsoft Windows Server 2016<10.0.14393.9339
10.0.14393.9339
Microsoft Windows Server 2012 R2<6.3.9600.23291
6.3.9600.23291
Microsoft Windows Server 2025<10.0.26100.33158
10.0.26100.33158
Microsoft Windows 10=1809
10.0.17763.9020
Microsoft Windows 10=1607
10.0.14393.9339
Microsoft Windows Server 2016<10.0.14393.9339
10.0.14393.9339
Microsoft Windows 10=1809
10.0.17763.9020
Microsoft Windows Server 2025<10.0.26100.33158
10.0.26100.33158
Microsoft Windows Server 2019<10.0.17763.9020
10.0.17763.9020
Microsoft Windows 10=1607
10.0.14393.9339
Microsoft Windows Server 2019<10.0.17763.9020
10.0.17763.9020
Microsoft Windows Server 2022<10.0.20348.5386
10.0.20348.5386
Microsoft .NET Framework=3.5
2.0.50727.8983 & 3.0.30729.8978
Microsoft .NET Framework=3.5
2.0.50727.8983 & 3.0.30729.8978
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0
Microsoft .NET Framework=3.5, =4.8.1
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0
Microsoft .NET Framework=4.6.2, =4.7, =4.7.1, =4.7.2
4.7.4143.0
Microsoft .NET Framework=4.6.2, =4.7, =4.7.1, =4.7.2
4.7.4143.0
Microsoft .NET Framework=3.5, =4.7.2
2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0
Microsoft .NET Framework=3.5, =4.7.2
2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0
Microsoft .NET Framework=3.5, =4.8
2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0
Microsoft .NET Framework=4.8
4.8.4803.0
Microsoft .NET Framework=4.8
4.8.4803.0
Microsoft .NET Framework=4.8
4.8.4803.0
Microsoft .NET Framework=4.8.1
4.8.9340.0
Microsoft Windows 10 1607<10.0.14393.9339
Microsoft Windows 10 1607<10.0.14393.9339
Microsoft Windows 10 1809<10.0.17763.9020
Microsoft Windows 10 1809<10.0.17763.9020
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016<10.0.14393.9339
Microsoft Windows Server 2019<10.0.17763.9020
Microsoft Windows Server 2022<10.0.20348.5386
Microsoft Windows Server 2025<10.0.26100.33158
All of the following
Microsoft .NET Framework=4.8.1
Any of the following
Microsoft Windows 11 26h1
Microsoft Windows 11 26h1
All of the following
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1607
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows Server 2016
All of the following
Any of the following
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8.1
Any of the following
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows 11 23h2
Microsoft Windows 11 23h2
Microsoft Windows 11 24h2
Microsoft Windows 11 24h2
Microsoft Windows 11 25h2
Microsoft Windows 11 25h2
Microsoft Windows Server 2022
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10 1809
Microsoft Windows 10 1809
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 21h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows 10 22h2
Microsoft Windows Server 2019
Microsoft Windows Server 2022
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.2
Any of the following
Microsoft Windows 10 1607
Microsoft Windows 10 1607
Microsoft Windows 10 1809
Microsoft Windows 10 1809
Microsoft Windows Server 2016
Microsoft Windows Server 2019
Remediation
Event History
Jul 14, 2026
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
CVE Published
via MITRE·05:06 PM
Data Sourced
via MITRE·05:06 PM
DescriptionSeverity
Data Sourced
via NVD·06:17 PM
RemedyDescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
What is the severity of CVE-2026-50368?
The severity of CVE-2026-50368 is classified as high with a score of 7.5.
2
What is CVE-2026-50368?
CVE-2026-50368 describes a stack-based buffer overflow in Active Directory Federation Services that allows unauthorized denial of service.
3
How do I fix CVE-2026-50368?
To fix CVE-2026-50368, you should apply the latest security updates provided by Microsoft for affected versions of Windows and .NET Framework.
4
What software is affected by CVE-2026-50368?
CVE-2026-50368 affects Microsoft .NET Framework, Windows 10, and multiple versions of Windows Server including 2012, 2016, and 2022.
5
What impact does CVE-2026-50368 have on systems?
CVE-2026-50368 can lead to a denial of service, making systems unavailable over the network for legitimate users.