{"id":"CVE-2025-48809","aliases":["EUVD-2025-20596","GHSA-58c9-xg8g-x33q"],"status":"published","title":"Windows Secure Kernel Mode Information Disclosure Vulnerability","description":"Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00509,"percentile":0.43746,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1037"],"published":"2025-07-08T16:57:40Z","modified":"2026-06-17T09:30:20Z","products":[{"vendor":"microsoft","product":"windows 11 version 24h2"},{"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_server_2025"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-48809","tags":["vendor-advisory","patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48809"},{"url":"https://github.com/advisories/GHSA-58c9-xg8g-x33q"}],"sources":{"cve":[{"id":"CVE-2025-48809","title":"Windows Secure Kernel Mode Information Disclosure Vulnerability","description":"Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.","status":"published","published":"2025-07-08T16:57:40.982Z","modified":"2026-02-13T19:07:16.246Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"cwes":["CWE-1037"],"updated_at":"2026-11-02T14:32:41.089134Z"}],"euvd":[{"id":"EUVD-2025-20596","description":"Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.","status":"published","published":"2025-07-08T16:57:40Z","modified":"2026-02-13T19:07:16Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T19:48:39.538725Z"}],"ghsa":[{"id":"GHSA-58c9-xg8g-x33q","title":"Processor optimization removal or modification of security-critical code in Windows Kernel allows...","description":"Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.","status":"published","published":"2025-07-08T18:31:45Z","modified":"2025-07-08T18:31:50Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"cwes":["CWE-1037"],"updated_at":"2026-11-02T15:02:57.125914Z"}],"nvd":[{"id":"CVE-2025-48809","description":"Processor optimization removal or modification of security-critical code in Windows Kernel allows an authorized attacker to disclose information locally.","status":"published","published":"2025-07-08T17:15:44.41Z","modified":"2026-06-17T09:30:20.57Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-1037"],"updated_at":"2026-11-02T14:11:17.727956Z"}]}}