CVE-2026-20946 HIGH

CVE-2026-20946: Microsoft Excel Remote Code Execution Vulnerability

Vendor Microsoft
Product Microsoft 365 Apps for Enterprise
Weakness CWE-125
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

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

Key dates

02Disclosure timeline

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

Related vulnerabilities

04Related CVE

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