8.8

CVE-2026-21513

Warnung
Medienbericht

MSHTML Framework Security Feature Bypass Vulnerability

Protection mechanism failure in MSHTML Framework allows an unauthorized attacker to bypass a security feature over a network.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Microsoft ≫ Windows 10 1607 HwPlatformx64 Version < 10.0.14393.8868
Microsoft ≫ Windows 10 1607 HwPlatformx86 Version < 10.0.14393.8868
Microsoft ≫ Windows 10 1809 HwPlatformx64 Version < 10.0.17763.8389
Microsoft ≫ Windows 10 1809 HwPlatformx86 Version < 10.0.17763.8389
Microsoft ≫ Windows 10 21h2 HwPlatformarm64 Version < 10.0.19044.6937
Microsoft ≫ Windows 10 21h2 HwPlatformx64 Version < 10.0.19044.6937
Microsoft ≫ Windows 10 21h2 HwPlatformx86 Version < 10.0.19044.6937
Microsoft ≫ Windows 10 22h2 HwPlatformarm64 Version < 10.0.19045.6937
Microsoft ≫ Windows 10 22h2 HwPlatformx64 Version < 10.0.19045.6937
Microsoft ≫ Windows 10 22h2 HwPlatformx86 Version < 10.0.19045.6937
Microsoft ≫ Windows 11 23h2 HwPlatformarm64 Version < 10.0.22631.6649
Microsoft ≫ Windows 11 23h2 HwPlatformx64 Version < 10.0.22631.6649
Microsoft ≫ Windows 11 24h2 HwPlatformarm64 Version < 10.0.26100.7781
Microsoft ≫ Windows 11 24h2 HwPlatformx64 Version < 10.0.26100.7781
Microsoft ≫ Windows 11 25h2 HwPlatformarm64 Version < 10.0.26200.7781
Microsoft ≫ Windows 11 25h2 HwPlatformx64 Version < 10.0.26200.7781
Microsoft ≫ Windows Server 2016 SwEdition- HwPlatformx64 Version < 10.0.14393.8868
Microsoft ≫ Windows Server 2019 SwEdition- HwPlatformx64 Version < 10.0.17763.8389
Microsoft ≫ Windows Server 2022 SwEdition- HwPlatformx64 Version < 10.0.20348.4711
Microsoft ≫ Windows Server 2022 23h2 SwEdition- HwPlatformx64 Version < 10.0.25398.2149
Microsoft ≫ Windows Server 2025 HwPlatformx64 Version < 10.0.26100.32313
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10.02.2026: CISA Known Exploited Vulnerabilities (KEV) Catalog

Microsoft Internet Explorer Protection Mechanism Failure Vulnerability

Schwachstelle

Microsoft Internet Explorer contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network.

Beschreibung

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Erforderliche Maßnahmen
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 15.38% 0.964
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
secure@microsoft.com 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-693 Protection Mechanism Failure

The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

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https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21513
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-21513
US Government Resource
https://www.vicarius.io/vsociety/posts/cve-2026-21513-detection-script-security-feature-bypass-vulnerability-in-mshtml-framework
Third Party Advisory
https://www.vicarius.io/vsociety/posts/cve-2026-21513-mitigation-script-security-feature-bypass-vulnerability-in-mshtml-framework
Third Party Advisory
Mitigation