CVE-2026-69836 — Entra ID RCE, CVSS 10.0: What Actually Happened and What You Should Do
On August 20, 2026, Microsoft disclosed CVE-2026-69836 — a remote code execution vulnerability in Microsoft Entra ID with a CVSS score of 10.0. The maximum possible. Then it got complicated. What the vulnerability is The root cause is CWE-502: deserialization of untrusted data. Entra ID was processing attacker-supplied input and converting it into active object structures without sufficient validation. The CVSS vector is about as bad as it gets: Network-reachable — no physical or local access needed No authentication required No user interaction — fully automated exploitation possible Low attack complexity High impact on confidentiality, integrity, and availability An attacker who successfully exploited this could execute arbitrary code within Microsoft’s Entra ID infrastructure — meaning potential access to token issuance logic, service principal configurations, and federation trusts. ...