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CVE-2026-49181

🗓️ 14 Jul 2026 17:05:49Reported by microsoftType 
cve
 cve🔗 web.nvd.nist.gov👁 3 Views

The CVE-2026-49181 entry describes an Integer underflow in the Windows DHCP Client that can allow an unauthorized attacker to elevate privileges over a network. Affected component: Windows DHCP Client (network stack on Windows). Root cause: wrap/u...

Related
Detection
Affected
Refs
Vulners
CNA
Node
microsoftwindows_10_1607Range10.0.14393.0–10.0.14393.9339x32
OR
microsoftwindows_10_1607Range10.0.14393.0–10.0.14393.9339x64
Node
microsoftwindows_10_1809Range10.0.17763.0–10.0.17763.9020x32
OR
microsoftwindows_10_1809Range10.0.17763.0–10.0.17763.9020x64
Node
microsoftwindows_server_2008Range6.2.9200.0–6.2.9200.26226x64
Node
microsoftwindows_server_2008Range6.2.9200.0–6.2.9200.26226server_core_installationx64
Node
microsoftwindows_server_2008Range6.3.9600.0–6.3.9600.23291x64
Node
microsoftwindows_server_2008Range6.3.9600.0–6.3.9600.23291server_core_installationx64
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 Server 2012",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "6.2.9200.0",
        "lessThan": "6.2.9200.26226",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "6.2.9200.0",
        "lessThan": "6.2.9200.26226",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012 R2",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "6.3.9600.0",
        "lessThan": "6.3.9600.23291",
        "versionType": "custom",
        "status": "affected"
      }
    ]
  },
  {
    "vendor": "Microsoft",
    "product": "Windows Server 2012 R2 (Server Core installation)",
    "platforms": [
      "x64-based Systems"
    ],
    "versions": [
      {
        "version": "6.3.9600.0",
        "lessThan": "6.3.9600.23291",
        "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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14 Jul 2026 20:34Current
6.1Medium risk
Vulners AI Score6.1
CVSS 3.17.5
SSVC
CWE-191
3