CVE-2026-21513

Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network...

CVE-2026-21513 MSHTML Framework Security Feature Bypass Vulnerability

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CVE-2026-21513

CVE-2026-21513 is a security feature bypass vulnerability in the MSHTML Framework. Affected component: MSHTML/MSHTML Framework used by Windows’ browsing/rendering stack. Root cause details are described in vendor advisories and security blogs as a protection mechanism bypass that can be triggered...

CISA Adds Six Known Exploited Vulnerabilities to Catalog

CISA has added six new vulnerabilities to its Known Exploited Vulnerabilities KEV Catalog, based on evidence of active exploitation. CVE-2026-21510link is external Microsoft Windows Shell Protection Mechanism Failure Vulnerability CVE-2026-21513link is external Microsoft MSHTML Framework Security...