Integer overflow or wraparound in Microsoft Office Excel 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

   Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

2. Oct 14, 2026 · NIST NVD

   Updated

   Integer overflow or wraparound in Microsoft Office Excel 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-2026-97778

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2026-97778

  30-day exploitation probability 0.6%

  first.org
• NIST NVDVulnerability recordCVE-2026-97778

  Integer overflow or wraparound in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.

  nvd.nist.gov

References

• Patch · msrc.microsoft.com