CVE-2026-20949 HIGH

CVE-2026-20949: Microsoft Excel Security Feature Bypass Vulnerability

Vendor Microsoft
Product Microsoft 365 Apps for Enterprise
Weakness CWE-284
Published January 13, 2026
Last update April 1, 2026
View on NVD All CVEs

CVSS base score

7.8/10
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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

Key dates

02Disclosure timeline

January 13, 2026 CVE published
April 1, 2026 Record updated