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CVE-2026-54986

🗓️ 14 Jul 2026 17:04:48Reported by microsoftType 
cve
 cve🔗 web.nvd.nist.gov👁 6 Views

CVE-2026-54986: heap-based buffer overflow in Windows Win32K enables local privilege escalation by an authorized attacker.

Related
Detection
Affected
Refs
ReporterTitlePublishedViews
Family
attackerkb		CVE-2026-54986
14 Jul 202617:04
–attackerkb
circl		CVE-2026-54986
14 Jul 202619:01
–circl
cvelist		CVE-2026-54986 Windows Win32k Elevation of Privilege Vulnerability
14 Jul 202617:04
–cvelist
euvd		EUVD-2026-44008
14 Jul 202618:32
–euvd
mscve		Windows Win32k Elevation of Privilege Vulnerability
14 Jul 202614:00
–mscve
ncsc		Vulnerabilities in Microsoft Windows
14 Jul 202618:13
–ncsc
nvd		CVE-2026-54986
14 Jul 202617:17
–nvd
ptsecurity		PT-2026-58232
14 Jul 202600:00
–ptsecurity
nessus		KB5099535: Windows 10 Version 1607 / Windows Server 2016 Security Update (July 2026)
14 Jul 202600:00
–nessus
nessus		KB5099536: Windows Server 2025 Security Update (July 2026)
14 Jul 202600:00
–nessus
Rows per page
Vulners
CNA
Node
OR
microsoftwindows_10_1607Range10.0.14393.0–10.0.14393.9339x32
microsoftwindows_10_1607Range10.0.14393.0–10.0.14393.9339x64
Node
OR
microsoftwindows_10_1809Range10.0.17763.0–10.0.17763.9020x32
microsoftwindows_10_1809Range10.0.17763.0–10.0.17763.9020x64
Node
OR
microsoftwindows_10_21h2Range10.0.19044.0–10.0.19044.7548x32
microsoftwindows_10_21h2Range10.0.19044.0–10.0.19044.7548arm64
microsoftwindows_10_21h2Range10.0.19044.0–10.0.19044.7548x64
Node
OR
microsoftwindows_11_22h2Range10.0.19045.0–10.0.19045.7548x32
microsoftwindows_11_22h2Range10.0.19045.0–10.0.19045.7548arm64
microsoftwindows_11_22h2Range10.0.19045.0–10.0.19045.7548x64
Node
OR
microsoftwindows_11_24h2Range10.0.26100.0–10.0.26100.8875arm64
microsoftwindows_11_24h2Range10.0.26100.0–10.0.26100.8875x64
Node
OR
microsoftwindows_11_25h2Range10.0.26200.0–10.0.26200.8875arm64
microsoftwindows_11_25h2Range10.0.26200.0–10.0.26200.8875x64
Node
OR
microsoftwindows_11_22h2Range10.0.28000.0–10.0.28000.2525arm64
microsoftwindows_11_22h2Range10.0.28000.0–10.0.28000.2525x64
Node
microsoftwindows_server_2008Range10.0.14393.0–10.0.14393.9339x64
Node
microsoftwindows_server_2008Range10.0.14393.0–10.0.14393.9339server_core_installationx64
Node
microsoftwindows_server_2008Range10.0.17763.0–10.0.17763.9020x64
Node
microsoftwindows_server_2008Range10.0.17763.0–10.0.17763.9020server_core_installationx64
Node
microsoftwindows_server_2008Range10.0.20348.0–10.0.20348.5386x64
Node
microsoftwindows_server_2008Range10.0.26100.0–10.0.26100.33158x64
Node
microsoftwindows_server_2008Range10.0.26100.0–10.0.26100.33158server_core_installationx64
[
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 1607",
    "platforms": [
      "32-bit Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9339",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 1809",
    "platforms": [
      "32-bit Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9020",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 21H2",
    "platforms": [
      "32-bit Systems",
      "ARM64-based Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.19044.0",
        "lessThan": "10.0.19044.7548",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 10 Version 22H2",
    "platforms": [
      "32-bit Systems",
      "ARM64-based Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.19045.0",
        "lessThan": "10.0.19045.7548",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 24H2",
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.8875",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 Version 25H2",
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.26200.0",
        "lessThan": "10.0.26200.8875",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows 11 version 26H1",
    "platforms": [
      "ARM64-based Systems",
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.28000.0",
        "lessThan": "10.0.28000.2525",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9339",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2016 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.14393.0",
        "lessThan": "10.0.14393.9339",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9020",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2019 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.17763.0",
        "lessThan": "10.0.17763.9020",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2022",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.20348.0",
        "lessThan": "10.0.20348.5386",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.33158",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2025 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "10.0.26100.0",
        "lessThan": "10.0.26100.33158",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  }
]

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15 Jul 2026 22:22Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.17.8
EPSS0.01725
SSVC
CWE-122
cve-2026-54986heap overflowwindows win32klocal privilege escalationauthorized attacker
6