← Back to CVE Explorer

CVE-2026-69789

Full vulnerability record from the local CVENow database.

Description

Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network.

Severity
HIGH
CVSS score
7.5 (v3.1)
Vulnerability status
Analyzed
Source identifier
Published
2026-10-13 19:18:59.293000
Last modified
2026-10-27 15:37:21.407000
View original CVE JSON
{
  "id": "CVE-2026-69789",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-13T19:18:59.293",
  "lastModified": "2026-10-27T15:37:21.407",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Heap-based buffer overflow in Reliable Multicast Transport Driver (RMCAST) allows an unauthorized attacker to execute code over an adjacent network."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Microsoft",
          "product": "Windows 10 Version 1607",
          "platforms": [
            "32-bit Systems",
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.14393.0",
              "lessThan": "10.0.14393.9512",
              "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": "10.0.17763.9245",
              "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": "10.0.19044.7725",
              "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": "10.0.19045.7725",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows 11 version 23H2",
          "platforms": [
            "ARM64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.22631.0",
              "lessThan": "10.0.22631.7582",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows 11 Version 23H2",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.22631.0",
              "lessThan": "10.0.22631.7582",
              "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": "10.0.26100.9445",
              "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": "10.0.26200.9445",
              "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": "10.0.28000.2954",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2012",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "6.2.9200.0",
              "lessThan": "6.2.9200.26349",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2012 (Server Core installation)",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "6.2.9200.0",
              "lessThan": "6.2.9200.26349",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2012 R2",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "6.3.9600.0",
              "lessThan": "6.3.9600.23398",
              "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": "6.3.9600.23398",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2016",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.14393.0",
              "lessThan": "10.0.14393.9512",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2016 (Server Core installation)",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.14393.0",
              "lessThan": "10.0.14393.9512",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2019",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.17763.0",
              "lessThan": "10.0.17763.9245",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2019 (Server Core installation)",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.17763.0",
              "lessThan": "10.0.17763.9245",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2022",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.20348.0",
              "lessThan": "10.0.20348.5622",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2025",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.26100.0",
              "lessThan": "10.0.26100.33438",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Windows Server 2025 (Server Core installation)",
          "platforms": [
            "x64-based Systems"
          ],
          "versions": [
            {
              "version": "10.0.26100.0",
              "lessThan": "10.0.26100.33438",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "ADJACENT_NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-13T21:07:52.858684Z",
          "id": "CVE-2026-69789",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-122"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.14393.9512",
              "matchCriteriaId": "F5BC051B-C14F-43DF-B3A2-A32EE0DDC142"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_1607:*:*:*:*:*:*:x86:*",
              "versionEndExcluding": "10.0.14393.9512",
              "matchCriteriaId": "D8DA8FA6-35F6-4E0F-A9C0-37CB88186C5B"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.17763.9245",
              "matchCriteriaId": "81786843-7838-4C74-AEA6-E64B6B354387"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:*",
              "versionEndExcluding": "10.0.17763.9245",
              "matchCriteriaId": "D5E29D31-09E1-4C19-AAB0-191AA960C778"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:*",
              "versionEndExcluding": "10.0.19044.7725",
              "matchCriteriaId": "26BFC889-B503-48BF-9D82-5B3043D9A6B3"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.19044.7725",
              "matchCriteriaId": "E6F2C029-D78A-4FAA-B2E8-FD79C2CABC32"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:*",
              "versionEndExcluding": "10.0.19044.7725",
              "matchCriteriaId": "0B423BD2-DDDC-4869-9B98-3275F53B92F1"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:*",
              "versionEndExcluding": "10.0.19045.7725",
              "matchCriteriaId": "254EF7C4-707D-4480-BC27-56F64175A9AD"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.19045.7725",
              "matchCriteriaId": "B318C958-84F6-4E33-A95C-6E95C7E286EB"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:*",
              "versionEndExcluding": "10.0.19045.7725",
              "matchCriteriaId": "9828DC67-F252-4E2B-AFE9-C404BAF414E0"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:*",
              "versionEndExcluding": "10.0.22631.7582",
              "matchCriteriaId": "97D353CE-F9A4-46B5-BC5C-BF422E10785D"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.22631.7582",
              "matchCriteriaId": "A2B42421-4694-4879-A69B-6A9192E2CFB8"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:*",
              "versionEndExcluding": "10.0.26100.9445",
              "matchCriteriaId": "990434BE-FE81-48CC-8803-94FAEB694DE2"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.26100.9445",
              "matchCriteriaId": "045BBF02-6FDD-44D4-B278-0C52A5406956"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:*",
              "versionEndExcluding": "10.0.26200.9445",
              "matchCriteriaId": "948460EF-4053-4106-8D9E-4EDC3BF7B682"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.26200.9445",
              "matchCriteriaId": "D4F1D717-582C-446B-B90F-1D25028DA77F"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:*",
              "versionEndExcluding": "10.0.28000.2954",
              "matchCriteriaId": "4B46D2B8-7E89-4818-862C-30B9751BA6EA"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.28000.2954",
              "matchCriteriaId": "165C7909-F15B-4328-A175-B9FEF3BEB82D"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*",
              "matchCriteriaId": "A7DF96F8-BA6A-4780-9CA3-F719B3F81074"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*",
              "matchCriteriaId": "DB18C4CE-5917-401E-ACF7-2747084FD36E"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_server_2016:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.14393.9512",
              "matchCriteriaId": "AA37ACE4-9746-40A9-8322-6D06B1873560"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.17763.9245",
              "matchCriteriaId": "29860E47-C99B-477A-A6A0-916E6095D766"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.20348.5622",
              "matchCriteriaId": "F275C1E8-54D9-4FFE-BAF6-B15CCE91B550"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:*",
              "versionEndExcluding": "10.0.26100.33438",
              "matchCriteriaId": "65F785F0-374C-45DC-B4B3-D74E64039608"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69789",
      "source": "[email protected]",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ]
    }
  ]
}