intelligence_src_d11443da85ea659d49
- Source-provided label
- Publisher RSS metadata
- Evidence class
- mentioned in report
- Confidence
- Not reported
- Observed
- Sep 17, 2025 00:00 UTC
- Retrieved
- Oct 13, 2026 15:39 UTC
Entra ID actor token validation bug allowing cross-tenant global admin
A critical vulnerability discovered in Microsoft's Entra ID (formerly Azure AD) allowed for cross-tenant access and potential global admin privilege escalation. The flaw was found in the legacy Azure AD Graph API, which improperly validated the originating tenant for undocumented "Actor tokens." An attacker could use a token from their own tenant to authenticate as any user, including Global Admins, in any other tenant. This vulnerability bypassed security policies like Conditional Access. The issue was reported to Microsoft, who deployed a global fix within days.
Reference details
- Source category
- research-report
- First reported
- Sep 17, 2025 00:00 UTC
- Last reported
- Sep 17, 2025 00:00 UTC
- Catalog updated
- Oct 13, 2026 15:39 UTC
- Record ID
59c23c21c71ef5bae6202ab7e92a1a583921fe89dae4395a0e51e9d6a35950e5
Published indicators
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Source observations
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1 sources: 0 stale, 0 needing attention, 0 paused, 0 unverified.
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