{"id":"CVE-2026-50526","state":"PUBLISHED","title":".NET Tampering Vulnerability","description":"Improper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally.","publishedAt":"2026-07-14T19:29:54.992Z","updatedAt":"2026-10-28T20:04:44.376Z","severity":{"score":7,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/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 8.0 runtime","Microsoft .NET 9.0 runtime","Microsoft Microsoft Visual Studio 2022 version 17.12","Microsoft Microsoft Visual Studio 2022 version 17.14","Microsoft Microsoft Visual Studio 2026 version 18.7"],"affected":[{"vendor":"Microsoft","product":".NET 10.0 runtime","versions":[{"version":"10.0.0","status":"affected","lessThan":"10.0.10","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 8.0 runtime","versions":[{"version":"8.0.0","status":"affected","lessThan":"8.0.29","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 9.0 runtime","versions":[{"version":"9.0.0","status":"affected","lessThan":"9.0.18","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.12","versions":[{"version":"17.12.0","status":"affected","lessThan":"17.12.22","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","status":"affected","lessThan":"17.14.36","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.7","versions":[{"version":"18.0","status":"affected","lessThan":"18.7.4","versionType":"custom"}]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526"],"weaknesses":["CWE-59","CWE-345"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/50xxx/CVE-2026-50526.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-50526","state":"PUBLISHED","datePublished":"2026-07-14T19:29:54.992Z","dateUpdated":"2026-10-28T20:04:44.376Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-06-04T19:00:41.293Z"},"containers":{"cna":{"title":".NET Tampering Vulnerability","descriptions":[{"lang":"en-US","value":"Improper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally."}],"affected":[{"vendor":"Microsoft","product":".NET 10.0 runtime","versions":[{"version":"10.0.0","status":"affected","lessThan":"10.0.10","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 8.0 runtime","versions":[{"version":"8.0.0","status":"affected","lessThan":"8.0.29","versionType":"custom"}]},{"vendor":"Microsoft","product":".NET 9.0 runtime","versions":[{"version":"9.0.0","status":"affected","lessThan":"9.0.18","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.12","versions":[{"version":"17.12.0","status":"affected","lessThan":"17.12.22","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2022 version 17.14","versions":[{"version":"17.14.0","status":"affected","lessThan":"17.14.36","versionType":"custom"}]},{"vendor":"Microsoft","product":"Microsoft Visual Studio 2026 version 18.7","versions":[{"version":"18.0","status":"affected","lessThan":"18.7.4","versionType":"custom"}]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50526","name":".NET Tampering Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":7,"vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en-US","type":"CWE"},{"cweId":"CWE-345","description":"CWE-345: Insufficient Verification of Data Authenticity","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-28T20:04:44.376Z"},"datePublic":"2026-07-14T14:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.12.0","versionEndExcluding":"17.12.22"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"9.0.0","versionEndExcluding":"9.0.18"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"8.0.0","versionEndExcluding":"8.0.29"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"10.0.0","versionEndExcluding":"10.0.10"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2026:*:*:*:*:*:*:*:*","versionStartIncluding":"18.0","versionEndExcluding":"18.7.4"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*","versionStartIncluding":"17.14.0","versionEndExcluding":"17.14.36"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T03:59:34.142603Z","id":"CVE-2026-50526","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-15T10:37:24.524Z"}}]}}}