CVE-2026-21514

Published Feb 10, 2026

Last updated 19 days ago

Overview

Description
Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.
Source
secure@microsoft.com
NVD status
Analyzed
Products
365_apps, office_long_term_servicing_channel

Risk scores

CVSS 3.1

Type
Secondary
Base score
7.8
Impact score
5.9
Exploitability score
1.8
Vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Severity
HIGH

Known exploits

Data from CISA

Vulnerability name
Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability
Exploit added on
Feb 10, 2026
Exploit action due
Mar 3, 2026
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Weaknesses

secure@microsoft.com
CWE-807

Social media

Hype score
Not currently trending

Configurations