{"id":"CVE-2026-65810","state":"PUBLISHED","title":".NET Framework Elevation of Privilege Vulnerability","description":"Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally.","publishedAt":"2026-08-11T17:07:00.409Z","updatedAt":"2026-10-30T17:22:45.764Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/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 Microsoft .NET Framework 3.5","Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2","Microsoft Microsoft .NET Framework 3.5 AND 4.7.2","Microsoft Microsoft .NET Framework 3.5 AND 4.8","Microsoft Microsoft .NET Framework 3.5 AND 4.8.1","Microsoft Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","Microsoft Microsoft .NET Framework 4.8","Microsoft Microsoft .NET Framework 4.8.1"],"affected":[{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5","versions":[{"version":"3.5.0","status":"affected","lessThan":"2.0.50727.9183 & 3.0.30729.9169","versionType":"custom"}],"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2","versions":[{"version":"3.0.0.0","status":"affected","lessThan":"2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0","versionType":"custom"}],"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows Server 2016","Windows Server 2016 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.7.2","versions":[{"version":"4.7.0","status":"affected","lessThan":"2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0","versionType":"custom"}],"platforms":["Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for ARM64-based Systems","Windows 10 Version 1809 for x64-based Systems","Windows Server 2019","Windows Server 2019 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.8","versions":[{"version":"4.8.0","status":"affected","lessThan":"2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0","versionType":"custom"}],"platforms":["Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for ARM64-based Systems","Windows 10 Version 1809 for x64-based Systems","Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server 2022","Windows Server 2022 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.8.1","versions":[{"version":"4.8.1","status":"affected","lessThan":"2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0","versionType":"custom"}],"platforms":["Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows 11 Version 23H2 for ARM64-based Systems","Windows 11 Version 23H2 for x64-based Systems","Windows 11 Version 24H2 for ARM64-based Systems","Windows 11 Version 24H2 for x64-based Systems","Windows 11 Version 25H2 for ARM64-based Systems","Windows 11 Version 25H2 for x64-based Systems","Windows Server 2022","Windows Server 2022 (Server Core installation)","Windows Server 2025","Windows Server 2025 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","versions":[{"version":"4.7.0","status":"affected","lessThan":"4.7.4144.0","versionType":"custom"}],"platforms":["Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 4.8","versions":[{"version":"4.8.0","status":"affected","lessThan":"4.8.4805.0","versionType":"custom"}],"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)","Windows Server 2016","Windows Server 2016 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 4.8.1","versions":[{"version":"4.8.0.0","status":"affected","lessThan":"4.8.9344.0","versionType":"custom"}],"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems"]}],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65810"],"weaknesses":["CWE-23"],"ingestedAt":"2026-10-30T17:34:04.696Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/65xxx/CVE-2026-65810.json","commit":"3341b8c15da9d44519feb86e18f02f360209d08a","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-65810","state":"PUBLISHED","datePublished":"2026-08-11T17:07:00.409Z","dateUpdated":"2026-10-30T17:22:45.764Z","assignerShortName":"microsoft","assignerOrgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateReserved":"2026-07-22T21:36:47.630Z"},"containers":{"cna":{"title":".NET Framework Elevation of Privilege Vulnerability","descriptions":[{"lang":"en-US","value":"Relative path traversal in .NET Framework allows an unauthorized attacker to elevate privileges locally."}],"affected":[{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5","versions":[{"version":"3.5.0","status":"affected","lessThan":"2.0.50727.9183 & 3.0.30729.9169","versionType":"custom"}],"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2","versions":[{"version":"3.0.0.0","status":"affected","lessThan":"2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0","versionType":"custom"}],"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows Server 2016","Windows Server 2016 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.7.2","versions":[{"version":"4.7.0","status":"affected","lessThan":"2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0","versionType":"custom"}],"platforms":["Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for ARM64-based Systems","Windows 10 Version 1809 for x64-based Systems","Windows Server 2019","Windows Server 2019 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.8","versions":[{"version":"4.8.0","status":"affected","lessThan":"2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0","versionType":"custom"}],"platforms":["Windows 10 Version 1809 for 32-bit Systems","Windows 10 Version 1809 for ARM64-based Systems","Windows 10 Version 1809 for x64-based Systems","Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows Server 2019","Windows Server 2019 (Server Core installation)","Windows Server 2022","Windows Server 2022 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 3.5 AND 4.8.1","versions":[{"version":"4.8.1","status":"affected","lessThan":"2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0","versionType":"custom"}],"platforms":["Windows 10 Version 21H2 for 32-bit Systems","Windows 10 Version 21H2 for ARM64-based Systems","Windows 10 Version 21H2 for x64-based Systems","Windows 10 Version 22H2 for 32-bit Systems","Windows 10 Version 22H2 for ARM64-based Systems","Windows 10 Version 22H2 for x64-based Systems","Windows 11 Version 23H2 for ARM64-based Systems","Windows 11 Version 23H2 for x64-based Systems","Windows 11 Version 24H2 for ARM64-based Systems","Windows 11 Version 24H2 for x64-based Systems","Windows 11 Version 25H2 for ARM64-based Systems","Windows 11 Version 25H2 for x64-based Systems","Windows Server 2022","Windows Server 2022 (Server Core installation)","Windows Server 2025","Windows Server 2025 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 4.6.2/4.7/4.7.1/4.7.2","versions":[{"version":"4.7.0","status":"affected","lessThan":"4.7.4144.0","versionType":"custom"}],"platforms":["Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 4.8","versions":[{"version":"4.8.0","status":"affected","lessThan":"4.8.4805.0","versionType":"custom"}],"platforms":["Windows 10 Version 1607 for 32-bit Systems","Windows 10 Version 1607 for x64-based Systems","Windows Server 2012","Windows Server 2012 (Server Core installation)","Windows Server 2012 R2","Windows Server 2012 R2 (Server Core installation)","Windows Server 2016","Windows Server 2016 (Server Core installation)"]},{"vendor":"Microsoft","product":"Microsoft .NET Framework 4.8.1","versions":[{"version":"4.8.0.0","status":"affected","lessThan":"4.8.9344.0","versionType":"custom"}],"platforms":["Windows 11 Version 26H1 for ARM64-based Systems","Windows 11 version 26H1 for x64-based Systems"]}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-65810","name":".NET Framework Elevation of Privilege Vulnerability","tags":["vendor-advisory","patch"]}],"metrics":[{"format":"CVSS","scenarios":[{"lang":"en-US","value":"GENERAL"}],"cvssV3_1":{"version":"3.1","baseSeverity":"HIGH","baseScore":7.8,"vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-23","description":"CWE-23: Relative Path Traversal","lang":"en-US","type":"CWE"}]}],"providerMetadata":{"shortName":"microsoft","orgId":"f38d906d-7342-40ea-92c1-6c4a2c6478c8","dateUpdated":"2026-10-30T17:22:45.764Z"},"datePublic":"2026-08-11T14:00:00.000Z","cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8.0.0","versionEndExcluding":"4.8.9344.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"3.5.0","versionEndExcluding":"2.0.50727.9183 & 3.0.30729.9169"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8.0","versionEndExcluding":"4.8.4805.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8.0","versionEndExcluding":"2.0.50727.9070 & 3.0.30729.9068 & 4.8.4805.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7.0","versionEndExcluding":"2.0.50727.9070 & 3.0.30729.9068 & 4.7.4144.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net_framework:*:*:*:*:*:*:*:*","versionStartIncluding":"3.0.0.0","versionEndExcluding":"2.0.50727.8984 & 3.0.30729.8980 & 4.7.4144.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7.0","versionEndExcluding":"4.7.4144.0"},{"vulnerable":true,"criteria":"cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*","versionStartIncluding":"4.8.1","versionEndExcluding":"2.0.50727.9183 & 3.0.30729.9169 & 4.8.9343.0"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-12T03:55:38.464741Z","id":"CVE-2026-65810","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":"2026-08-12T14:56:53.042Z"}}]}}}