Description
Loop with unreachable exit condition ('infinite loop') in Active Directory Federation Services (AD FS) allows an unauthorized attacker to deny service over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft .NET Framework 3.5 AND 4.7.2 | 4.7.0 – < 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0 | 2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8 | 4.8.0 – < 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0 | 2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0 |
| Microsoft | Microsoft .NET Framework 3.5 AND 4.8.1 | 4.8.1 – < 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 | 2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 |
| Microsoft | Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 | 4.7.0 – < 4.7.4143.0 | 4.7.4143.0 |
| Microsoft | Microsoft .NET Framework 4.8 | 4.8.0 – < 4.8.4803.0 | 4.8.4803.0 |
| Microsoft | Microsoft .NET Framework 4.8.1 | 4.8.0.0 – < 4.8.9340.0 | 4.8.9340.0 |
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 – < 10.0.14393.9339 | 10.0.14393.9339 |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < 10.0.17763.9020 | 10.0.17763.9020 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – < 10.0.19044.7548 | 10.0.19044.7548 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – < 10.0.19045.7548 | 10.0.19045.7548 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – < 10.0.26100.8875 | 10.0.26100.8875 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – < 10.0.26200.8875 | 10.0.26200.8875 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – < 10.0.28000.2525 | 10.0.28000.2525 |
| Microsoft | Windows Server 2012 | 6.2.9200.0 – < 6.2.9200.26226 | 6.2.9200.26226 |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 – < 6.2.9200.26226 | 6.2.9200.26226 |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 – < 6.3.9600.23291 | 6.3.9600.23291 |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 – < 6.3.9600.23291 | 6.3.9600.23291 |
| Microsoft | Windows Server 2016 | 10.0.14393.0 – < 10.0.14393.9339 | 10.0.14393.9339 |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 – < 10.0.14393.9339 | 10.0.14393.9339 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.9020 | 10.0.17763.9020 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.9020 | 10.0.17763.9020 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.5386 | 10.0.20348.5386 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.33158 | 10.0.26100.33158 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.33158 | 10.0.26100.33158 |
Advisories 3
- WID-SEC-2026-2316 Microsoft Windows Produkte: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 6, 2026
- MSRC-CVE-2026-50647 Active Directory Federation Server Denial of Service Vulnerability Microsoft Security Response Center · Jul 21, 2026
- NCSC-2026-0231 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Jul 14, 2026
References
- Active Directory Federation Server Denial of Service Vulnerability vendor-advisory patch