CVE-2026-21513

{"id": "CVE-2026-21513", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "secure@microsoft.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.8, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 2.8}]}, "published": "2026-02-10T18:16:33.643", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21513", "tags": ["Vendor Advisory"], "source": "secure@microsoft.com"}, {"url": "https://www.vicarius.io/vsociety/posts/cve-2026-21513-detection-script-security-feature-bypass-vulnerability-in-mshtml-framework", "tags": ["Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.vicarius.io/vsociety/posts/cve-2026-21513-mitigation-script-security-feature-bypass-vulnerability-in-mshtml-framework", "tags": ["Mitigation", "Third Party Advisory"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21513", "tags": ["US Government Resource"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-693"}]}], "descriptions": [{"lang": "en", "value": "Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network."}, {"lang": "es", "value": "Falla del mecanismo de protecci\u00f3n en el framework MSHTML permite a un atacante no autorizado eludir una caracter\u00edstica de seguridad a trav\u00e9s de una red."}], "lastModified": "2026-03-30T13:28:07.120", "cisaActionDue": "2026-03-03", "cisaExploitAdd": "2026-02-10", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "E78A20FD-B910-43DF-BE89-E971E2FD0049", "versionEndExcluding": "10.0.14393.8868"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "B941280B-97F6-4F60-80A3-40482A74488D", "versionEndExcluding": "10.0.14393.8868"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*", "vulnerable": true, "matchCriteriaId": "C09C54DA-6AB0-4696-A2F2-C11CFC292EA9", "versionEndExcluding": "10.0.17763.8389"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*", "vulnerable": true, "matchCriteriaId": "369B4E41-3895-4CB7-BD37-D2E4A4D52FB9", "versionEndExcluding": "10.0.17763.8389"}, {"criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*", "vulnerable": true, "matchCriteriaId": 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