{"id":"CVE-2026-50302","title":"Windows Cryptographic Services Security Feature Bypass Vulnerability","summary":"Improper certificate validation in Windows Cryptographic Services allows an unauthorized attacker to bypass a security feature over a network.","severity":"medium","cvss":4.2,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-295"],"vendor":"Microsoft","product":"Windows 10 Version 21H2","affected":["windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7548","windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7548","windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875","windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875","windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525","windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5386","windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33158","windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33158"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-07-15T13:05:24.924102Z"},"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:30:18.647Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-50302","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50302","label":"Windows Cryptographic Services Security Feature Bypass Vulnerability"}],"tags":["cve.org"],"epss":0.00334,"epssPercentile":0.26926,"ingestedAt":"2026-09-08T17:06:31.922Z","slug":"CVE-2026-50302","body":"## Overview\n\nImproper certificate validation in Windows Cryptographic Services allows an unauthorized attacker to bypass a security feature over a network.\n\n## Affected\n\n- `windows_10_version_21h2 >= 10.0.19044.0 < 10.0.19044.7548`\n- `windows_10_version_22h2 >= 10.0.19045.0 < 10.0.19045.7548`\n- `windows_11_version_24h2 >= 10.0.26100.0 < 10.0.26100.8875`\n- `windows_11_version_25h2 >= 10.0.26200.0 < 10.0.26200.8875`\n- `windows_11_version_26h1 >= 10.0.28000.0 < 10.0.28000.2525`\n- `windows_server_2022 >= 10.0.20348.0 < 10.0.20348.5386`\n- `windows_server_2025 >= 10.0.26100.0 < 10.0.26100.33158`\n- `windows_server_2025_server_core_installation >= 10.0.26100.0 < 10.0.26100.33158`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":23,"depthScoreParts":{"impact":23.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}