Skype for Business Remote Code Execution Vulnerability

{
  "id": "976e0d19a4667bf753013e9d9957ebcf9a11d1a6b23f2766dd42330c1aa675a2",
  "url": "https://www.cve.org/CVERecord?id=CVE-2026-66302",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Skype for Business Remote Code Execution Vulnerability",
    "summary": "External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.",
    "evidence": "cve:CVE-2026-66302",
    "products": [
      {
        "name": {
          "value": "Skype for Business Server 2015 CU13",
          "evidence": "/containers/cna/affected/0/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Skype for Business Server 2019 CU8",
          "evidence": "/containers/cna/affected/1/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      },
      {
        "name": {
          "value": "Skype for Business Server Subscription Edition CU1",
          "evidence": "/containers/cna/affected/2/product"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-66302",
      "aliases": [
        "CVE-2026-66302"
      ],
      "metrics": [
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"
          },
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "affected": [
        {
          "vendor": "Microsoft",
          "product": "Skype for Business Server 2015 CU13",
          "versions": [
            {
              "status": "affected",
              "version": "9319.0",
              "lessThan": "6.0.9319.885",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Skype for Business Server 2019 CU8",
          "versions": [
            {
              "status": "affected",
              "version": "2046.0",
              "lessThan": "7.0.2046.569",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        },
        {
          "vendor": "Microsoft",
          "product": "Skype for Business Server Subscription Edition CU1",
          "versions": [
            {
              "status": "affected",
              "version": "2046.0",
              "lessThan": "7.0.2046.879",
              "versionType": "custom"
            }
          ],
          "platforms": [
            "x64-based Systems"
          ]
        }
      ],
      "modified": "2026-10-26T23:24:39.870Z",
      "provider": "cve",
      "references": [
        "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302"
      ],
      "provider_metadata": {
        "adp": [
          {
            "title": "CISA ADP Vulnrichment",
            "metrics": [
              {
                "other": {
                  "type": "ssvc",
                  "content": {
                    "id": "CVE-2026-66302",
                    "role": "CISA Coordinator",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "yes"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "version": "2.0.3",
                    "timestamp": "2026-09-09T04:26:28.465510Z"
                  }
                }
              }
            ],
            "providerMetadata": {
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP",
              "dateUpdated": "2026-09-09T09:54:44.566Z"
            }
          }
        ],
        "cna": {
          "orgId": "f38d906d-7342-40ea-92c1-6c4a2c6478c8",
          "shortName": "microsoft",
          "dateUpdated": "2026-10-26T23:24:39.870Z"
        }
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-66302",
        "evidence": "/cveMetadata/cveId"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/containers/cna/metrics"
  },
  "source_id": "core-cve",
  "document_id": 360349,
  "published_at": "2026-09-08T18:30:35.349+00:00"
}