Microsoft Office 365 for Mac vulnerability

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Published 11 Aug 2026Updated 21 Oct 20261 sources
CVSS 7.8

What happened

Heap-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

Affected versions

Microsoft Office 365 for Mac: 1.0.0 through before 16.112.26081010 (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.