CVE-2026-50647: CWE-835: Loop with Unreachable Exit Condition ('Infinite Loop') in Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
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.
CVSS v3.1
Score 7.5high
Affected software
Microsoft
Microsoft .NET Framework 3.5 AND 4.7.2
Microsoft
Microsoft .NET Framework 3.5 AND 4.8
Microsoft
Microsoft .NET Framework 3.5 AND 4.8.1
Microsoft
Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2
Microsoft
Microsoft .NET Framework 4.8
Microsoft
Microsoft .NET Framework 4.8.1
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows 10 Version 21H2
Microsoft
Windows 10 Version 22H2
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-50647) affects Microsoft .NET Framework versions 3.5 through 4.7.2 and is classified under CWE-835 (Loop with Unreachable Exit Condition). It occurs in Active Directory Federation Services (AD FS) where an infinite loop can be triggered, leading to denial of service. The flaw allows an unauthenticated attacker to cause service disruption remotely. Microsoft has published an official fix to address this issue.
Potential Impact
An attacker can exploit this vulnerability to cause a denial of service (DoS) by triggering an infinite loop in AD FS, making the service unavailable over the network. There is no impact on confidentiality or integrity, but availability is severely affected.
Mitigation Recommendations
An official fix is available from Microsoft. Users should apply the patch provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50647 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-06-05T14:33:50.830Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50647","vendor":"Microsoft"}]
Threat ID: 6a5676a968715ace43f096d4
Added to database: 07/14/2026, 17:49:29 UTC
Last enriched: 08/13/2026, 15:09:27 UTC
Last updated: 10/13/2026, 18:57:38 UTC
Views: 95
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.