CVE-2026-64909

HIGH CVSS 7.8 View on NVD ↗

Integer underflow (wrap or wraparound) in Microsoft Office 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: Aug 11, 2026 17:18 UTC Modified: Aug 12, 2026 05:19 UTC