{"id":"CVE-2026-85817","title":"Reliance on untrusted inputs in a security decision in Windows PowerShell allows an unauthorized attacker to execute code over a network.","summary":"Reliance on untrusted inputs in a security decision in Windows PowerShell 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-807"],"vendor":"microsoft","product":"windows_10_1607","affected":["windows_10_1607 < 10.0.14393.9612","windows_10_1809 < 10.0.17763.9376","windows_10_21h2 < 10.0.19044.7807","windows_10_22h2 < 10.0.19045.7807","windows_11_23h2 < 10.0.22631.7652","windows_11_24h2 < 10.0.26100.9711","windows_11_25h2 < 10.0.26200.9711","windows_11_26h1 < 10.0.28000.3231","windows_11_26h2 < 10.0.26300.9711","windows_server_2012","windows_server_2012 = r2","windows_server_2016 < 10.0.14393.9612","windows_server_2019 < 10.0.17763.9376","windows_server_2022 < 10.0.20348.5761","windows_server_2025 < 10.0.26100.33650"],"patched":["windows_10_1607 10.0.14393.9612","windows_10_1809 10.0.17763.9376","windows_10_21h2 10.0.19044.7807","windows_10_22h2 10.0.19045.7807","windows_11_23h2 10.0.22631.7652","windows_11_24h2 10.0.26100.9711","windows_11_25h2 10.0.26200.9711","windows_11_26h1 10.0.28000.3231","windows_11_26h2 10.0.26300.9711","windows_server_2016 10.0.14393.9612","windows_server_2019 10.0.17763.9376","windows_server_2022 10.0.20348.5761","windows_server_2025 10.0.26100.33650"],"published":"2026-10-13","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:58:55.693","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-85817","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85817","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-13T20:09:43.266374Z"},"epss":0.00723,"epssPercentile":0.53803,"ingestedAt":"2026-10-13T19:43:29.172Z","slug":"CVE-2026-85817","body":"## Overview\n\nReliance on untrusted inputs in a security decision in Windows PowerShell allows an unauthorized attacker to execute code over a network.\n\n## Affected\n\n- `windows_10_1607 < 10.0.14393.9612`\n- `windows_10_1809 < 10.0.17763.9376`\n- `windows_10_21h2 < 10.0.19044.7807`\n- `windows_10_22h2 < 10.0.19045.7807`\n- `windows_11_23h2 < 10.0.22631.7652`\n- `windows_11_24h2 < 10.0.26100.9711`\n- `windows_11_25h2 < 10.0.26200.9711`\n- `windows_11_26h1 < 10.0.28000.3231`\n- `windows_11_26h2 < 10.0.26300.9711`\n- `windows_server_2012`\n- `windows_server_2012 = r2`\n- `windows_server_2016 < 10.0.14393.9612`\n- `windows_server_2019 < 10.0.17763.9376`\n- `windows_server_2022 < 10.0.20348.5761`\n- `windows_server_2025 < 10.0.26100.33650`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `windows_10_1607 10.0.14393.9612`\n- `windows_10_1809 10.0.17763.9376`\n- `windows_10_21h2 10.0.19044.7807`\n- `windows_10_22h2 10.0.19045.7807`\n- `windows_11_23h2 10.0.22631.7652`\n- `windows_11_24h2 10.0.26100.9711`\n- `windows_11_25h2 10.0.26200.9711`\n- `windows_11_26h1 10.0.28000.3231`\n- `windows_11_26h2 10.0.26300.9711`\n- `windows_server_2016 10.0.14393.9612`\n- `windows_server_2019 10.0.17763.9376`\n- `windows_server_2022 10.0.20348.5761`\n- `windows_server_2025 10.0.26100.33650`","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}