{"id":"CVE-2026-62871","title":".NET Elevation of Privilege Vulnerability","summary":"Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.","severity":"high","cvss":7.8,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-787","CWE-122"],"vendor":"Microsoft","product":".NET 8.0","affected":[".net_8.0 >= 8.0.0 < 8.0.30",".net_9.0 >= 9.0.0 < 9.0.19","visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.38","visual_studio_2026_version_18.8 >= 18.0 < 18.8.3"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-12T03:55:30.622636Z"},"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:25:56.252Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-62871","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-62871","label":".NET Elevation of Privilege Vulnerability"},{"url":"https://github.com/dotnet/wpf/security/advisories/GHSA-vg44-h755-9hw7"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-62871"},{"url":"https://github.com/dotnet/announcements/issues/431"},{"url":"https://github.com/advisories/GHSA-vg44-h755-9hw7"}],"tags":["cve.org","ghsa","nuget"],"epss":0.00396,"epssPercentile":0.33547,"aliases":["GHSA-vg44-h755-9hw7"],"ecosystem":"nuget","patched":["Microsoft.WindowsDesktop.App.Runtime.win-arm64 10.0.11","Microsoft.WindowsDesktop.App.Runtime.win-x64 10.0.11","Microsoft.WindowsDesktop.App.Runtime.win-x86 10.0.11","Microsoft.WindowsDesktop.App.Runtime.win-arm64 9.0.19","Microsoft.WindowsDesktop.App.Runtime.win-x64 9.0.19","Microsoft.WindowsDesktop.App.Runtime.win-x86 9.0.19","Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.30","Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.30","Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.30"],"ingestedAt":"2026-08-11T19:48:28.941Z","slug":"CVE-2026-62871","body":"## Overview\n\nOut-of-bounds write in .NET allows an unauthorized attacker to execute code locally.\n\n## Affected\n\n- `.net_8.0 >= 8.0.0 < 8.0.30`\n- `.net_9.0 >= 9.0.0 < 9.0.19`\n- `visual_studio_2022_version_17.14 >= 17.14.0 < 17.14.38`\n- `visual_studio_2026_version_18.8 >= 18.0 < 18.8.3`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-62871)\n\nAffected packages:\n\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.10`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 10.0.0, <= 10.0.10`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 10.0.0, <= 10.0.10`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.18`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 9.0.0, <= 9.0.18`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 9.0.0, <= 9.0.18`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.29`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 8.0.0, <= 8.0.29`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 8.0.0, <= 8.0.29`\n\nPatched in:\n\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 10.0.11`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 10.0.11`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 10.0.11`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 9.0.19`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 9.0.19`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 9.0.19`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.30`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.30`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.30`\n\nSource: https://github.com/advisories/GHSA-vg44-h755-9hw7","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}