CVEvulnerability

CVE-2026-21514

7.8 HIGH Known exploited Published 2026-02-10 Modified 2026-06-17 Official page ↗

CISA Known Exploited Vulnerability

Microsoft Office Word Reliance on Untrusted Inputs in a Security Decision Vulnerability — Microsoft Office

Microsoft Office Word contains a reliance on untrusted inputs in a security decision vulnerability that could allow an authorized attacker to elevate privileges locally.

Added to KEV
2026-02-10
Remediation due
2026-03-03
Ransomware use
Unknown
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.
Notes
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21514 ; https://nvd.nist.gov/vuln/detail/CVE-2026-21514
Status
Analyzed
Published
2026-02-10
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weaknesses
CWE-807

Description

Reliance on untrusted inputs in a security decision in Microsoft Office Word allows an unauthorized attacker to bypass a security feature locally.

Affected configurations

• microsoft 365 apps • microsoft office long term servicing channel 2021 • microsoft office long term servicing channel 2024

Related

Weakness · CWE (1)

  • CWE-807 Reliance on Untrusted Inputs in a Security Decision weakness

References