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Microsoft patches critical flaws across Entra ID, Arc, and Exchange Online that could enable remote code execution

1 min read
Source: BleepingComputer
Microsoft patches critical flaws across Entra ID, Arc, and Exchange Online that could enable remote code execution
Photo: BleepingComputer
TL;DR Summary

Microsoft has patched multiple maximum-severity vulnerabilities in Entra ID, Azure Arc, and Exchange Online that could let attackers with no privileges execute code remotely and escalate privileges. Key flaws include CVE-2026-69836 in Entra ID (deserialization of untrusted data), CVE-2026-65816 and CVE-2026-69555 in Azure Arc, CVE-2026-65801 in Exchange Online, and CVE-2026-65770 affecting an Azure Managed Instance for Apache Cassandra. Patches are in place and no action is required, with exploit code not publicly available. An August update notes CVE-2026-69836 was initially misflagged as exploited in the wild.

Topics:technology#azure-arc#entra-id#exchange-online#privilege-escalation#remote-code-execution#security
Share this article
  1. Microsoft patches max severity code execution, privilege escalation flaws  BleepingComputer
  2. Microsoft Patches Severe Entra ID Flaw (CVSS 10.0) Allowing Remote Code Execution  The Hacker News
  3. Critical Microsoft Entra ID vulnerability exploited in the wild (CVE-2026-69836)  Help Net Security
  4. Microsoft discloses maximum severity flaw in Entra ID  Cybersecurity Dive
  5. Microsoft sounds alarm as perfect-10 Entra ID flaw comes under attack  The Register

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