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

Timeline

Detection, updates, and resolution for this record.

1. Oct 13, 2026 · NIST NVD

   Detected

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

2. Oct 14, 2026 · NIST NVD

   Updated

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

Affected

• cpe microsoft/365 appsversion unspecified
• cpe microsoft/microsoft 365version unspecified
• cpe microsoft/office 2021version unspecified
• cpe microsoft/office 2024version unspecified

Sources

• CVE.orgCVE-2026-70220

  Official CVE identifier

  cve.org
• FIRST EPSSCVE-2026-70220

  30-day exploitation probability 0.4%

  first.org
• NIST NVDCVE-2026-70220

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

  nvd.nist.gov

References

• Vendor Advisory · msrc.microsoft.com