{"id":"CVE-2025-55229","aliases":["EUVD-2025-25495","GHSA-vj5w-xw66-qjq5"],"status":"published","title":"Windows Certificate Spoofing Vulnerability","description":"Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.","severity":{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00505,"percentile":0.435,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-347"],"published":"2025-08-21T19:50:40Z","modified":"2026-06-17T09:41:29Z","products":[{"vendor":"microsoft","product":"windows 10 version 1507"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows 10 version 1809"},{"vendor":"microsoft","product":"windows 10 version 21h2"},{"vendor":"microsoft","product":"windows 10 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 22h2"},{"vendor":"microsoft","product":"windows 11 version 22h3"},{"vendor":"microsoft","product":"windows 11 version 23h2"},{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows server 2019"},{"vendor":"microsoft","product":"windows server 2019 (server core installation)"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2022, 23h2 edition (server core installation)"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_10_1507"},{"vendor":"microsoft","product":"windows_10_1607"},{"vendor":"microsoft","product":"windows_10_1809"},{"vendor":"microsoft","product":"windows_10_21h2"},{"vendor":"microsoft","product":"windows_10_22h2"},{"vendor":"microsoft","product":"windows_11_22h2"},{"vendor":"microsoft","product":"windows_11_23h2"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_server_2016"},{"vendor":"microsoft","product":"windows_server_2019"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2022_23h2"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-55229","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-55229"},{"url":"https://github.com/advisories/GHSA-vj5w-xw66-qjq5"}],"sources":{"cve":[{"id":"CVE-2025-55229","title":"Windows Certificate Spoofing Vulnerability","description":"Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-08-21T19:50:40.421Z","modified":"2026-02-13T18:55:01.33Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:32:52.839698Z"}],"euvd":[{"id":"EUVD-2025-25495","description":"Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-08-21T19:50:40Z","modified":"2026-02-13T18:55:01Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T19:48:39.538725Z"}],"ghsa":[{"id":"GHSA-vj5w-xw66-qjq5","title":"Improper verification of cryptographic signature in Windows Certificates allows an unauthorized...","description":"Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-08-21T21:32:07Z","modified":"2025-08-21T21:32:13Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T15:03:22.719724Z"}],"nvd":[{"id":"CVE-2025-55229","description":"Improper verification of cryptographic signature in Windows Certificates allows an unauthorized attacker to perform spoofing over a network.","status":"published","published":"2025-08-21T20:15:47.07Z","modified":"2026-06-17T09:41:29.653Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-347"],"updated_at":"2026-11-02T14:11:25.261243Z"}]}}