{"id":"CVE-2026-71328","state":"PUBLISHED","title":".NET and Visual Studio Remote Code Execution Vulnerability","description":"Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network.","publishedAt":"2026-09-08T17:18:10.094Z","updatedAt":"2026-10-30T21:56:28.354Z","severity":{"score":8.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","source":"microsoft"},"assigner":"microsoft","products":["Microsoft .NET 10.0 runtime","Microsoft .NET 11.0 runtime","Microsoft .NET 8.0 runtime","Microsoft .NET 9.0 runtime","Microsoft Microsoft Visual Studio 2022 version 17.14","Microsoft Microsoft Visual Studio 2026 version 18.9"],"affected":[{"vendor":"Microsoft","product":".NET 10.0 runtime","versions":[{"version":"10.0.0","status":"affected","lessThan":"10.0.12","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 11.0 runtime","versions":[{"version":"11.0.0","status":"affected","lessThan":"11.0 RC1","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 8.0 runtime","versions":[{"version":"8.0.0","status":"affected","lessThan":"8.0.31","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 9.0 runtime","versions":[{"version":"9.0.0","status":"affected","lessThan":"9.0.20","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","status":"affected","lessThan":"17.14.40","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.9","versions":[{"version":"18.9.0","status":"affected","lessThan":"18.9.3","versionType":"custom"}]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71328"],"weaknesses":["CWE-122"],"ingestedAt":"2026-10-30T22:10:04.526Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71328.json","commit":"686bbcd50f7a8fdb58e370472927aab6f903551f","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71328","state":"PUBLISHED","datePublished":"2026-09-08T17:18:10.094Z","dateUpdated":"2026-10-30T21:56:28.354Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-08-05T18:41:50.333Z"},"containers":{"cna":{"title":".NET and Visual Studio Remote Code Execution Vulnerability","descriptions":[{"lang":"en-US","value":"Heap-based buffer overflow in Visual Studio allows an unauthorized attacker to execute code over a network."}],"affected":[{"vendor":"Microsoft","product":".NET 10.0 runtime","versions":[{"version":"10.0.0","status":"affected","lessThan":"10.0.12","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 11.0 runtime","versions":[{"version":"11.0.0","status":"affected","lessThan":"11.0 RC1","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 8.0 runtime","versions":[{"version":"8.0.0","status":"affected","lessThan":"8.0.31","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 9.0 runtime","versions":[{"version":"9.0.0","status":"affected","lessThan":"9.0.20","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","status":"affected","lessThan":"17.14.40","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.9","versions":[{"version":"18.9.0","status":"affected","lessThan":"18.9.3","versionType":"custom"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-71328","name":".NET and Visual Studio Remote Code Execution Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":8.8,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","description":"CWE-122: Heap-based Buffer Overflow","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-30T21:56:28.354Z"},"datePublic":"2026-09-08T14:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*","versionStartIncluding":"18.9.0","versionEndExcluding":"18.9.3"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.12"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.0.31"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.20"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.14.0","versionEndExcluding":"17.14.40"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"11.0.0","versionEndExcluding":"11.0 RC1"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-71328","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-09-09T04:18:27.816893Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-09T09:54:52.652Z"}}]}}}