{"id":"CVE-2026-66302","state":"PUBLISHED","title":"Skype for Business Remote Code Execution Vulnerability","description":"External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network.","publishedAt":"2026-09-08T18:30:35.349Z","updatedAt":"2026-10-26T23:24:39.870Z","severity":{"score":9.8,"label":"Critical","version":"3.1","vector":"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","source":"microsoft"},"assigner":"microsoft","products":["Microsoft Skype for Business Server 2015 CU13","Microsoft Skype for Business Server 2019 CU8","Microsoft Skype for Business Server Subscription Edition CU1"],"affected":[{"vendor":"Microsoft","product":"Skype for Business Server 2015 CU13","versions":[{"version":"9319.0","status":"affected","lessThan":"6.0.9319.885","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Skype for Business Server 2019 CU8","versions":[{"version":"2046.0","status":"affected","lessThan":"7.0.2046.569","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Skype for Business Server Subscription Edition CU1","versions":[{"version":"2046.0","status":"affected","lessThan":"7.0.2046.879","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302"],"weaknesses":["CWE-73"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/66xxx/CVE-2026-66302.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-66302","state":"PUBLISHED","datePublished":"2026-09-08T18:30:35.349Z","dateUpdated":"2026-10-26T23:24:39.870Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-07-24T18:06:51.294Z"},"containers":{"cna":{"title":"Skype for Business Remote Code Execution Vulnerability","descriptions":[{"lang":"en-US","value":"External control of file name or path in Skype for Business allows an unauthorized attacker to execute code over a network."}],"affected":[{"vendor":"Microsoft","product":"Skype for Business Server 2015 CU13","versions":[{"version":"9319.0","status":"affected","lessThan":"6.0.9319.885","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Skype for Business Server 2019 CU8","versions":[{"version":"2046.0","status":"affected","lessThan":"7.0.2046.569","versionType":"custom"}],"platforms":["x64-based Systems"]},{"vendor":"Microsoft","product":"Skype for Business Server Subscription Edition CU1","versions":[{"version":"2046.0","status":"affected","lessThan":"7.0.2046.879","versionType":"custom"}],"platforms":["x64-based Systems"]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66302","name":"Skype for Business Remote Code Execution Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"CRITICAL","baseScore":9.8,"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-73","description":"CWE-73: External Control of File Name or Path","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-26T23:24:39.870Z"},"datePublic":"2026-09-08T14:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:skype_for_business_server_2019:*:cu8:*:*:*:*:*:*","versionStartIncluding":"2046.0","versionEndExcluding":"7.0.2046.569"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:skype_for_business_server_subscription_edition:*:cu1:*:*:*:*:*:*","versionStartIncluding":"2046.0","versionEndExcluding":"7.0.2046.879"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:skype_for_business_server_2015:*:cu13:*:*:*:*:*:*","versionStartIncluding":"9319.0","versionEndExcluding":"6.0.9319.885"}]}]}]},"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":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-09T09:54:44.566Z"}}]}}}