KEV · Actively exploited

CVE-2026-21513

HIGH 8.8 Vendor bulletin scale — NVD CVSS pending KEV Published on 2026-02-10

MSHTML Framework Security Feature Bypass Vulnerability

EPSS 15.38% moderate exploit risk percentile 96.5%

CISA Known Exploited Vulnerability

Added to KEV: 2026-02-10
Remediation deadline: 2026-03-03
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.
Ransomware: Unknown (not documented by CISA)

This CVE is resolved by the following OS security releases. Update the OS to at least the listed version.