{
  "document": {
    "acknowledgments": [
      {
        "names": [
          "Milan Justel with Microsoft"
        ]
      }
    ],
    "aggregate_severity": {
      "namespace": "https://www.microsoft.com/en-us/msrc/security-update-severity-rating-system",
      "text": "Critical"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "Public",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "general",
        "text": "To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle",
        "title": "Additional Resources"
      },
      {
        "category": "legal_disclaimer",
        "text": "The information provided in the Microsoft Knowledge Base is provided \\\"as is\\\" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.",
        "title": "Disclaimer"
      },
      {
        "category": "general",
        "text": "Required. The vulnerability documented by this CVE requires customer action to resolve.",
        "title": "Customer Action"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "secure@microsoft.com",
      "name": "Microsoft Security Response Center",
      "namespace": "https://msrc.microsoft.com"
    },
    "references": [
      {
        "category": "self",
        "summary": "CVE-2025-21379 DHCP Client Service Remote Code Execution Vulnerability - HTML",
        "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21379"
      },
      {
        "category": "self",
        "summary": "CVE-2025-21379 DHCP Client Service Remote Code Execution Vulnerability - CSAF",
        "url": "https://msrc.microsoft.com/csaf/advisories/2025/msrc_cve-2025-21379.json"
      },
      {
        "category": "external",
        "summary": "Microsoft Exploitability Index",
        "url": "https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1"
      },
      {
        "category": "external",
        "summary": "Microsoft Support Lifecycle",
        "url": "https://support.microsoft.com/lifecycle"
      },
      {
        "category": "external",
        "summary": "Common Vulnerability Scoring System",
        "url": "https://www.first.org/cvss"
      }
    ],
    "title": "DHCP Client Service Remote Code Execution Vulnerability",
    "tracking": {
      "current_release_date": "2025-02-11T08:00:00.000Z",
      "generator": {
        "date": "2025-03-19T17:45:57.556Z",
        "engine": {
          "name": "MSRC Generator",
          "version": "1.0"
        }
      },
      "id": "msrc_CVE-2025-21379",
      "initial_release_date": "2025-02-11T08:00:00.000Z",
      "revision_history": [
        {
          "date": "2025-02-11T08:00:00.000Z",
          "legacy_version": "1",
          "number": "1",
          "summary": "Information published."
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c10.0.26100.3194",
            "product": {
              "name": "Windows Server 2025 (Server Core installation) \u003c10.0.26100.3194",
              "product_id": "1"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.3194",
            "product": {
              "name": "Windows Server 2025 (Server Core installation) 10.0.26100.3194",
              "product_id": "12437"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2025 (Server Core installation)"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c10.0.26100.3194",
            "product": {
              "name": "Windows 11 Version 24H2 for ARM64-based Systems \u003c10.0.26100.3194",
              "product_id": "4"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.3194",
            "product": {
              "name": "Windows 11 Version 24H2 for ARM64-based Systems 10.0.26100.3194",
              "product_id": "12389"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 24H2 for ARM64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c10.0.26100.3194",
            "product": {
              "name": "Windows 11 Version 24H2 for x64-based Systems \u003c10.0.26100.3194",
              "product_id": "3"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.3194",
            "product": {
              "name": "Windows 11 Version 24H2 for x64-based Systems 10.0.26100.3194",
              "product_id": "12390"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows 11 Version 24H2 for x64-based Systems"
      },
      {
        "branches": [
          {
            "category": "product_version_range",
            "name": "\u003c10.0.26100.3194",
            "product": {
              "name": "Windows Server 2025 \u003c10.0.26100.3194",
              "product_id": "2"
            }
          },
          {
            "category": "product_version",
            "name": "10.0.26100.3194",
            "product": {
              "name": "Windows Server 2025 10.0.26100.3194",
              "product_id": "12436"
            }
          }
        ],
        "category": "product_name",
        "name": "Windows Server 2025"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2025-21379",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "general",
          "text": "Microsoft",
          "title": "Assigning CNA"
        },
        {
          "category": "faq",
          "text": "The attacker must inject themselves into the logical network path between the target and the resource requested by the victim to read or modify network communications. This is called a machine-in-the-middle (MITM) attack.",
          "title": "According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?"
        },
        {
          "category": "faq",
          "text": "This attack is limited to systems connected to the same network segment as the attacker. The attack cannot be performed across multiple networks (for example, a WAN) and would be limited to systems on the same network switch or virtual network.",
          "title": "According to the CVSS score, the attack vector is adjacent (AV:A). What does this mean for this vulnerability?"
        }
      ],
      "product_status": {
        "fixed": [
          "12389",
          "12390",
          "12436",
          "12437"
        ],
        "known_affected": [
          "1",
          "2",
          "3",
          "4"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "CVE-2025-21379 DHCP Client Service Remote Code Execution Vulnerability - HTML",
          "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21379"
        },
        {
          "category": "self",
          "summary": "CVE-2025-21379 DHCP Client Service Remote Code Execution Vulnerability - CSAF",
          "url": "https://msrc.microsoft.com/csaf/advisories/2025/msrc_cve-2025-21379.json"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2025-02-11T08:00:00.000Z",
          "details": "10.0.26100.3194:Security Update:https://support.microsoft.com/help/5051987",
          "product_ids": [
            "1",
            "4",
            "3",
            "2"
          ],
          "url": "https://support.microsoft.com/help/5051987"
        },
        {
          "category": "vendor_fix",
          "date": "2025-02-11T08:00:00.000Z",
          "details": "10.0.26100.3107:SecurityHotpatchUpdate:https://support.microsoft.com/help/5052105",
          "product_ids": [
            "1",
            "4",
            "3",
            "2"
          ],
          "url": "https://support.microsoft.com/help/5052105"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "ADJACENT_NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "environmentalsScore": 0.0,
            "exploitCodeMaturity": "UNPROVEN",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "remediationLevel": "OFFICIAL_FIX",
            "reportConfidence": "CONFIRMED",
            "scope": "UNCHANGED",
            "temporalScore": 6.2,
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C",
            "version": "3.1"
          },
          "products": [
            "1",
            "2",
            "3",
            "4"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Remote Code Execution"
        },
        {
          "category": "exploit_status",
          "details": "Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely"
        }
      ],
      "title": "DHCP Client Service Remote Code Execution Vulnerability"
    }
  ]
}