CVE-2026-42901: CWE-346: Origin Validation Error in Microsoft Microsoft Entra
Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-42901) in Microsoft Entra ID is classified as CWE-346 (Origin Validation Error). It enables an attacker without privileges to elevate their privileges remotely over the network. The CVSS 3.1 vector indicates it is exploitable with no user interaction, low attack complexity, and results in complete compromise of confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an attacker to gain elevated privileges on Microsoft Entra ID, potentially leading to full system compromise including unauthorized access and control over sensitive resources. The vulnerability affects confidentiality, integrity, and availability at the highest level.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patch promptly. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42901 for detailed remediation instructions.
CVE-2026-42901: CWE-346: Origin Validation Error in Microsoft Microsoft Entra
Description
Origin validation error in Microsoft Entra ID allows an unauthorized attacker to elevate privileges over a network.
CVSS v3.1
Score 10.0critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-42901) in Microsoft Entra ID is classified as CWE-346 (Origin Validation Error). It enables an attacker without privileges to elevate their privileges remotely over the network. The CVSS 3.1 vector indicates it is exploitable with no user interaction, low attack complexity, and results in complete compromise of confidentiality, integrity, and availability. Microsoft has published an official fix to address this issue.
Potential Impact
Successful exploitation allows an attacker to gain elevated privileges on Microsoft Entra ID, potentially leading to full system compromise including unauthorized access and control over sensitive resources. The vulnerability affects confidentiality, integrity, and availability at the highest level.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the vendor-provided patch promptly. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42901 for detailed remediation instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-04-30T22:35:54.967Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42901","vendor":"Microsoft"}]
Threat ID: 6a10d8e7e1370fbb485de14b
Added to database: 05/22/2026, 22:29:59 UTC
Last enriched: 06/22/2026, 14:33:57 UTC
Last updated: 07/29/2026, 13:23:35 UTC
Views: 743
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