High MSRC-CVE-2026-50653 1 CVE

Azure Active Directory Denial of Service Vulnerability

Published Jul 14, 2026 · Updated Jul 21, 2026 · Revision 4

Vendor: Microsoft

Summary

Impact: Denial of Service. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.

Details

Security updates
8.19.2 — https://github.com/AzureAD/azure-activedirectory-identitymodel-extensions-for-dotnet/blob/dev/CHANGELOG.md
2.0.50727.9182 & 3.0.30729.9168 — https://support.microsoft.com/help/5101014
4.8.9340.0 — https://support.microsoft.com/help/5101002
4.8.4803.0 — https://support.microsoft.com/help/5101007
4.8.4803.0 — https://support.microsoft.com/help/5101009
4.8.4803.0 — https://support.microsoft.com/help/5101011
2.0.50727.9069 & 3.0.30729.9067 & 4.8.4803.0 — https://support.microsoft.com/help/5101008
2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0 — https://support.microsoft.com/help/5101010
2.0.50727.9182 & 3.0.30729.9168 & 4.8.4803.0 — https://support.microsoft.com/help/5101006
2.0.50727.9069 & 3.0.30729.9067 & 4.7.4143.0 — https://support.microsoft.com/help/5100989
2.0.50727.8983 & 3.0.30729.8978 & 4.7.4143.0 — https://support.microsoft.com/help/5099535
4.7.4143.0 — https://support.microsoft.com/help/5100990
4.7.4143.0 — https://support.microsoft.com/help/5100991
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 — https://support.microsoft.com/help/5101005
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 — https://support.microsoft.com/help/5101000
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9340.0 — https://support.microsoft.com/help/5100998
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 — https://support.microsoft.com/help/5101004
2.0.50727.9182 & 3.0.30729.9168 & 4.8.9339.0 — https://support.microsoft.com/help/5101001
2.0.50727.8983 & 3.0.30729.8978 — https://support.microsoft.com/help/5100984
2.0.50727.8983 & 3.0.30729.8978 — https://support.microsoft.com/help/5100985

Vulnerabilities 1

High 7.5

CVE-2026-50653

Azure Active Directory Denial of Service Vulnerability

Loop with unreachable exit condition ('infinite loop') in Azure Active Directory allows an unauthorized attacker to deny service over a network.

Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2 Microsoft .NET Framework 3.5 AND 4.7.2 Microsoft .NET Framework 3.5 AND 4.8

Jul 14, 2026

Revision history

2026-07-21 #4
Updated product information in the Software Update table. This is an informational change only.
2026-07-20 #3
Updated product information in the Software Update table. This is an informational change only.
2026-07-16 #2
Updated product information in the Software Update table. This is an informational change only.
2026-07-14 #1
Information published.

References

CVE-2026-50653 Azure Active Directory Denial of Service Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50653
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
Common Vulnerability Scoring System
https://www.first.org/cvss