{"id":"CVE-2026-87697","title":"Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.","summary":"Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","cwe":["CWE-502"],"vendor":"Microsoft","product":"Microsoft.WindowsDesktop.App.Runtime.win-arm64","affected":["Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.20","Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 9.0.0, <= 9.0.20","Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 9.0.0, <= 9.0.20","Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.31","Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 8.0.0, <= 8.0.31","Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 8.0.0, <= 8.0.31","Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1","Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1","Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 11.0.0-preview.1, <= 11.0.0-rc.1","Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.12","Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 10.0.0, <= 10.0.12","Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 10.0.0, <= 10.0.12"],"patched":["Microsoft.WindowsDesktop.App.Runtime.win-arm64 9.0.21","Microsoft.WindowsDesktop.App.Runtime.win-x64 9.0.21","Microsoft.WindowsDesktop.App.Runtime.win-x86 9.0.21","Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.32","Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.32","Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.32","Microsoft.WindowsDesktop.App.Runtime.win-arm64 11.0.0-rc.2","Microsoft.WindowsDesktop.App.Runtime.win-x64 11.0.0-rc.2","Microsoft.WindowsDesktop.App.Runtime.win-x86 11.0.0-rc.2","Microsoft.WindowsDesktop.App.Runtime.win-arm64 10.0.13","Microsoft.WindowsDesktop.App.Runtime.win-x64 10.0.13","Microsoft.WindowsDesktop.App.Runtime.win-x86 10.0.13"],"published":"2026-10-13","updated":"2026-10-13","sourceUpdated":"2026-10-13T21:19:37.640","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-87697","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-87697","label":"secure@microsoft.com"},{"url":"https://github.com/dotnet/wpf/security/advisories/GHSA-c27m-942f-rcfh"},{"url":"https://github.com/dotnet/announcements/issues/471"},{"url":"https://github.com/dotnet/wpf/issues/12021"},{"url":"https://github.com/advisories/GHSA-c27m-942f-rcfh"}],"tags":["nvd","ghsa","nuget"],"aliases":["GHSA-c27m-942f-rcfh"],"ecosystem":"nuget","ingestedAt":"2026-10-13T19:43:29.201Z","slug":"CVE-2026-87697","body":"## Overview\n\nDeserialization of untrusted data in .NET allows an unauthorized attacker to execute code over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-87697)\n\nAffected packages:\n\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 9.0.0, <= 9.0.20`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 9.0.0, <= 9.0.20`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 8.0.0, <= 8.0.31`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 8.0.0, <= 8.0.31`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 11.0.0-preview.1, <= 11.0.0-rc.1`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 >= 10.0.0, <= 10.0.12`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 >= 10.0.0, <= 10.0.12`\n\nPatched in:\n\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 9.0.21`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 9.0.21`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 9.0.21`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 8.0.32`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 8.0.32`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 8.0.32`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 11.0.0-rc.2`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 11.0.0-rc.2`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 11.0.0-rc.2`\n- `Microsoft.WindowsDesktop.App.Runtime.win-arm64 10.0.13`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x64 10.0.13`\n- `Microsoft.WindowsDesktop.App.Runtime.win-x86 10.0.13`\n\nSource: https://github.com/advisories/GHSA-c27m-942f-rcfh","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}