CVE-2026-20946

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

Out-of-bounds read in Microsoft Office Excel allows an unauthorized attacker to execute code locally.

CWE-125

microsoft 365 appsmicrosoft excelmicrosoft officemicrosoft office long term servicing channel