Microsoft 365 Apps for Enterprise vulnerability

Microsoft Office Outlook Remote Code Execution Vulnerability

Published 23 Sep 2026Updated 25 Sep 20261 sources
CVSS 8.8

What happened

Microsoft Office Outlook Remote Code Execution Vulnerability

Affected versions

Microsoft 365 Apps for Enterprise: 16.0.1 through before https://aka.ms/OfficeSecurityReleases (custom); 16.0.0 through before https://aka.ms/OfficeSecurityReleases (custom) Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

  • Apply vendor-provided updates or mitigations.
  • Review affected product exposure and access logs.

Public PoC references

No public PoC reference has passed the current publication threshold.