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Microsoft warns of max severity Entra ID flaw exploited in attacks
August 21, 2026 · BleepingComputer · Severity: HIGH
Microsoft patched a maximum-severity vulnerability in the Entra ID identity and access management platform that has been exploited in attacks. The flaw, assigned a CVSS 10.0 rating, allows remote code execution through deserialization of untrusted data. Microsoft confirmed active exploitation in the wild and has deployed automatic fixes. This is a critical update for all organizations using Microsoft Entra ID for identity management.
Key Takeaways
- Microsoft patched a CVSS 10.0 Entra ID vulnerability actively exploited in attacks.
- The flaw allows remote code execution through deserialization of untrusted data.
- Microsoft has automatically deployed the fix, requiring no customer action.