CVEvulnerability
CVE-2026-55899
7.8 HIGH
Official page ↗
- Status
- Analyzed
- Published
- 2026-07-14
- Last modified
- 2026-07-16
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- Weaknesses
- CWE-121, CWE-20
Description
Stack-based buffer overflow in Microsoft Office Excel allows an unauthorized attacker to execute code locally.
Affected configurations
• microsoft 365 apps
• microsoft excel 2016
• microsoft microsoft 365
• microsoft office 2019
• microsoft office 2021
• microsoft office 2024
• microsoft office online server (< 16.0.10417.20175)
Related
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55899 Patch, Vendor Advisory