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

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

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 over a network.

2. Oct 14, 2026 · NIST NVD

   Updated

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

Affected

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

Sources

• CVE.orgVulnerability recordCVE-2026-70301

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-70301

  30-day exploitation probability 0.8%

  first.org
• NIST NVDVulnerability recordCVE-2026-70301

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

  nvd.nist.gov

References

• Vendor Advisory · msrc.microsoft.com