CVE-2026-55899

HIGH CVSS 7.8 View on NVD ↗

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

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Published: Jul 14, 2026 17:17 UTC Modified: Jul 15, 2026 12:18 UTC