CVE-2026-21509

⚠ KEVEPSS 12.1%

Microsoft Office Security Feature Bypass Vulnerability

Added to CISA KEV: 1/26/2026

Description

Microsoft Office contains a security feature bypass vulnerability in which reliance on untrusted inputs in a security decision in Microsoft Office could allow an unauthorized attacker to bypass a security feature locally. Some of the impacted product(s) could be end-of-life (EoL) and/or end-of-service (EoS). Users are advised to discontinue use and/or transition to a supported version.

Affected packages (0)

No package mapping in OSV.