CVE-2026-21513

HighCVSS 8.8/10Known exploited (CISA KEV)Last modified Jun 17, 2026

Description

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

Metrics

CVSS 3.1 8.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-693

Affected software

No affected versions have been published.

Timeline

Published
Feb 10, 2026
Last modified
Jun 17, 2026
Added to CISA KEV
Feb 10, 2026
NVD status
Analyzed

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CVE-2026-21513: High severity, CVSS 8.8 | Vulnix