Secure Boot Certificate Expiration Security Feature Bypass Vulnerability_CVE-2026-21265

{
    "lastseen": "",
    "description": "",
    "published": "2026-01-13T17:56:04.224Z",
    "modified": "2026-01-13T18:03:52.015Z",
    "type": "cve",
    "title": "Secure Boot Certificate Expiration Security Feature Bypass Vulnerability",
    "source": "microsoft",
    "references": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21265",
    "id": "CVE-2026-21265",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1329"
    ],
    "cvelist": null,
    "sourceData": "Microsoft Windows 10 Version 1809 10.0.17763.0\nMicrosoft Windows Server 2019 10.0.17763.0\nMicrosoft Windows Server 2019 (Server Core installation) 10.0.17763.0\nMicrosoft Windows Server 2022 10.0.20348.0\nMicrosoft Windows 10 Version 21H2 10.0.19044.0\nMicrosoft Windows 10 Version 22H2 10.0.19045.0\nMicrosoft Windows Server 2025 (Server Core installation) 10.0.26100.0\nMicrosoft Windows 11 Version 25H2 10.0.26200.0\nMicrosoft Windows 11 version 22H3 10.0.22631.0\nMicrosoft Windows 11 Version 23H2 10.0.22631.0\nMicrosoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0\nMicrosoft Windows 11 Version 24H2 10.0.26100.0\nMicrosoft Windows Server 2025 10.0.26100.0\nMicrosoft Windows 10 Version 1607 10.0.14393.0\nMicrosoft Windows Server 2016 10.0.14393.0\nMicrosoft Windows Server 2016 (Server Core installation) 10.0.14393.0\nMicrosoft Windows Server 2012 6.2.9200.0\nMicrosoft Windows Server 2012 (Server Core installation) 6.2.9200.0\nMicrosoft Windows Server 2012 R2 6.3.9600.0\nMicrosoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.4,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Windows 10 Version 1809",
    "version": "10.0.17763.0",
    "vendor": "Microsoft",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}