{
  "id": "CVE-2026-68820",
  "url": "https://spydr.io/cve/CVE-2026-68820",
  "published": "2026-08-11T17:19:06.357Z",
  "modified": "2026-08-16T19:17:24.183Z",
  "score": 7,
  "severity": "high",
  "cvss_version": "3.1",
  "vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "score_source": "microsoft.com",
  "epss": 0.00332,
  "epss_percentile": 0.2414,
  "exploited": true,
  "kev": {
    "added": "2026-08-11",
    "due": "2026-08-25",
    "action": "Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.",
    "ransomware": "Unknown",
    "name": "Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability",
    "notes": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-68820 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-68820"
  },
  "ssvc_exploitation": "active",
  "vendors": [
    "Microsoft"
  ],
  "products": [
    "Microsoft Windows 10 Version 1607",
    "Microsoft Windows 10 Version 1809",
    "Microsoft Windows 10 Version 21H2",
    "Microsoft Windows 10 Version 22H2",
    "Microsoft Windows 11 version 23H2",
    "Microsoft Windows 11 Version 24H2",
    "Microsoft Windows 11 Version 25H2",
    "Microsoft Windows 11 version 26H1",
    "Microsoft Windows Server 2012",
    "Microsoft Windows Server 2012 (Server Core installation)",
    "Microsoft Windows Server 2012 R2",
    "Microsoft Windows Server 2012 R2 (Server Core installation)",
    "Microsoft Windows Server 2016",
    "Microsoft Windows Server 2016 (Server Core installation)",
    "Microsoft Windows Server 2019",
    "Microsoft Windows Server 2019 (Server Core installation)",
    "Microsoft Windows Server 2022",
    "Microsoft Windows Server 2025",
    "Microsoft Windows Server 2025 (Server Core installation)"
  ],
  "cwes": [
    "CWE-416"
  ],
  "description": "Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.",
  "status": "Analyzed",
  "score_type": "Secondary",
  "scores": {
    "cvss_v40": null,
    "cvss_v31": 7,
    "cvss_v30": null
  },
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    },
    {
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-68820",
      "tags": [
        "US Government Resource"
      ]
    }
  ],
  "nvd_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68820",
  "covered_in": [],
  "attribution": [
    {
      "source": "NVD",
      "url": "https://nvd.nist.gov",
      "notice": "This product uses data from the NVD API but is not endorsed or certified by the NVD."
    },
    {
      "source": "CISA KEV",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "notice": "Known exploited vulnerabilities from the CISA KEV catalog."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss",
      "notice": "Exploit prediction scores from FIRST EPSS."
    }
  ]
}