Critical CVE-2026-69836 in Microsoft Entra ID Exploited in the Wild

Microsoft disclosed a critical remote code execution vulnerability in Entra ID, tracked as CVE-2026-69836, which has been actively exploited in the wild. This flaw, stemming from unsafe deserialization of untrusted data, allows unauthenticated attackers to execute code remotely. The vulnerability was published on August 20, 2026, and is rated CVSS 10.0, indicating maximum severity. Microsoft has fully mitigated the vulnerability on its servers, requiring no action from users. However, the lack of details regarding the exploitation timeline and affected tenants raises concerns among security professionals. Other critical vulnerabilities were also disclosed, including CVE-2026-65801 in Exchange Online, which allows unauthorized privilege escalation. Organizations relying on Entra ID for authentication should review access logs for any anomalies during the exploitation window. No public proof-of-concept or active exploitation was confirmed for other vulnerabilities at the time of disclosure.

Key Points: • CVE-2026-69836 is a critical RCE vulnerability in Entra ID, exploited in the wild. • Microsoft has fully mitigated the vulnerability, requiring no customer action. • Security teams should review logs for anomalies during the exploitation window.