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Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

High CVSS 7.8
CVECVE-2026-55039
First seen2026-07-16 15:15 UTC
Disclosed2026-07-14 18:18 UTC
Last updated2026-07-16 15:15 UTC
Channel statusauto

Summary

Integer underflow (wrap or wraparound) in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Affected products

  • :

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD