CVE-2026-20965: CWE-347: Improper Verification of Cryptographic Signature in Microsoft Windows Admin Center in Azure Portal
Improper verification of cryptographic signature in Windows Admin Center allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability (CWE-347) in Windows Admin Center in Azure Portal arises from improper verification of cryptographic signatures. An authorized attacker with local access can exploit this flaw to elevate privileges, potentially gaining higher-level permissions than intended. The CVSS vector indicates that exploitation requires local access with high attack complexity and privileges, but no user interaction. The vulnerability affects version 1.0 of the product. Microsoft has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, impacting confidentiality, integrity, and availability of the affected system. This could enable the attacker to perform unauthorized actions with elevated rights within Windows Admin Center in Azure Portal.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official update from Microsoft to remediate the improper cryptographic signature verification issue. Since this is not a cloud service, remediation depends on applying the patch to the affected installations.
CVE-2026-20965: CWE-347: Improper Verification of Cryptographic Signature in Microsoft Windows Admin Center in Azure Portal
Description
Improper verification of cryptographic signature in Windows Admin Center allows an authorized attacker to elevate privileges locally.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-347) in Windows Admin Center in Azure Portal arises from improper verification of cryptographic signatures. An authorized attacker with local access can exploit this flaw to elevate privileges, potentially gaining higher-level permissions than intended. The CVSS vector indicates that exploitation requires local access with high attack complexity and privileges, but no user interaction. The vulnerability affects version 1.0 of the product. Microsoft has released a patch to remediate this issue.
Potential Impact
Successful exploitation allows an authorized local attacker to elevate privileges, impacting confidentiality, integrity, and availability of the affected system. This could enable the attacker to perform unauthorized actions with elevated rights within Windows Admin Center in Azure Portal.
Mitigation Recommendations
A patch is available for this vulnerability. It is recommended to apply the official update from Microsoft to remediate the improper cryptographic signature verification issue. Since this is not a cloud service, remediation depends on applying the patch to the affected installations.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2025-12-04T20:04:16.341Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 69668ae6a60475309f9ae271
Added to database: 1/13/2026, 6:11:50 PM
Last enriched: 4/3/2026, 12:53:24 PM
Last updated: 5/8/2026, 2:47:15 PM
Views: 160
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