CVE-2026-69556 Advisory
Severity: HIGH (CVSS 8.8)
Affected Product:
- Microsoft Defender Business
Vulnerability: Heap-based buffer overflow in Microsoft Office Word allowing remote code execution via network attack vector.
KEV Status: Not currently listed as exploited
Remediation:
- Review and apply available security updates from Microsoft Security Response Center
- Reference: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69556
Recommendation: Prioritize patching due to high CVSS score and network-exploitable nature. Monitor for updates and deploy promptly once available.