{"id":"CVE-2026-55144","aliases":["EUVD-2026-44034","GHSA-4r8r-cjr4-hvqr"],"status":"published","title":"Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability","description":"Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.","severity":{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00225,"percentile":0.13377,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-325"],"published":"2026-07-14T17:05:06Z","modified":"2026-11-10T22:35:38Z","products":[{"vendor":"microsoft","product":"windows 11 version 24h2"},{"vendor":"microsoft","product":"windows 11 version 25h2"},{"vendor":"microsoft","product":"windows 11 version 26h1"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows server 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"},{"vendor":"microsoft","product":"windows_11_24h2"},{"vendor":"microsoft","product":"windows_11_25h2"},{"vendor":"microsoft","product":"windows_11_26h1"},{"vendor":"microsoft","product":"windows_server_2022"},{"vendor":"microsoft","product":"windows_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55144","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55144"},{"url":"https://github.com/advisories/GHSA-4r8r-cjr4-hvqr"}],"sources":{"cve":[{"id":"CVE-2026-55144","title":"Windows Cryptography API: Next Generation (CNG) Tampering Vulnerability","description":"Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-07-14T17:05:06.598Z","modified":"2026-11-10T22:35:38.778Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-325"],"updated_at":"2026-11-10T23:49:29.755102Z"}],"euvd":[{"id":"EUVD-2026-44034","description":"Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-07-14T17:05:06Z","modified":"2026-11-10T22:35:38Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-10T23:24:15.503335Z"}],"ghsa":[{"id":"GHSA-4r8r-cjr4-hvqr","title":"Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform...","description":"Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-07-14T18:32:10Z","modified":"2026-07-14T18:32:16Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-325"],"updated_at":"2026-11-02T15:09:28.885137Z"}],"nvd":[{"id":"CVE-2026-55144","description":"Missing cryptographic step in Windows CryptoAPI allows an authorized attacker to perform tampering locally.","status":"published","published":"2026-07-14T17:17:09.327Z","modified":"2026-07-21T05:16:34.72Z","cvss":[{"version":"3.1","score":7.1,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-325"],"updated_at":"2026-11-02T14:12:29.489525Z"}]}}