CVE-2026-20949

high

Microsoft

CVSS v3 Base Score

7.8

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

Published: January 13, 2026

Last Modified: January 16, 2026

Description

Improper access control in Microsoft Office Excel allows an unauthorized attacker to bypass a security feature locally.

CWE-284

microsoft 365 appsmicrosoft office long term servicing channel