{"id":"CVE-2026-20818","aliases":["EUVD-2026-2190","GHSA-hxrp-mjg3-hpmr"],"status":"published","title":"Windows Kernel Information Disclosure Vulnerability","description":"Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.","severity":{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00712,"percentile":0.53928,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-532"],"published":"2026-01-13T17:56:14Z","modified":"2026-07-30T20:46:32Z","products":[{"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_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-2026-20818","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20818"},{"url":"https://github.com/advisories/GHSA-hxrp-mjg3-hpmr"}],"sources":{"cve":[{"id":"CVE-2026-20818","title":"Windows Kernel Information Disclosure Vulnerability","description":"Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-01-13T17:56:14.582Z","modified":"2026-07-30T20:46:32.434Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T13:35:44.571002Z"}],"euvd":[{"id":"EUVD-2026-2190","description":"Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-01-13T17:56:14Z","modified":"2026-07-30T20:46:32Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:02:27.233735Z"}],"ghsa":[{"id":"GHSA-hxrp-mjg3-hpmr","title":"Insertion of sensitive information into log file in Windows Kernel allows an unauthorized...","description":"Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-01-13T18:31:08Z","modified":"2026-01-13T18:31:17Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T15:05:35.156514Z"}],"nvd":[{"id":"CVE-2026-20818","description":"Insertion of sensitive information into log file in Windows Kernel allows an unauthorized attacker to disclose information locally.","status":"published","published":"2026-01-13T18:16:08.81Z","modified":"2026-06-17T10:17:50.333Z","cvss":[{"version":"3.1","score":6.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-532"],"updated_at":"2026-11-02T14:12:03.683495Z"}]}}