{"id":"CVE-2026-84004","aliases":["EUVD-2026-121550","GHSA-xp4w-4whf-xg8h"],"status":"published","title":"AMD Zen Information Disclosure Vulnerability","description":"Processor optimization removal or modification of security-critical code in AMD Zen 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":"2026-11-12","score":0.0043,"percentile":0.37709,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-1037"],"published":"2026-11-10T18:15:17Z","modified":"2026-11-10T21:33:59Z","products":[{"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 23h2"},{"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 11 version 26h2"},{"vendor":"microsoft","product":"windows server 2012"},{"vendor":"microsoft","product":"windows server 2012 (server core installation)"},{"vendor":"microsoft","product":"windows server 2012 r2"},{"vendor":"microsoft","product":"windows server 2012 r2 (server core installation)"},{"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 2025"},{"vendor":"microsoft","product":"windows server 2025 (server core installation)"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-84004","tags":["vendor-advisory","patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84004"},{"url":"https://github.com/advisories/GHSA-xp4w-4whf-xg8h"}],"sources":{"cve":[{"id":"CVE-2026-84004","title":"AMD Zen Information Disclosure Vulnerability","description":"Processor optimization removal or modification of security-critical code in AMD Zen allows an authorized attacker to disclose information locally.","status":"published","published":"2026-11-10T18:15:17.524Z","modified":"2026-11-12T21:42:28.53Z","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":"2026-11-10T19:39:59.74912Z"}],"euvd":[{"id":"EUVD-2026-121550","description":"Processor optimization removal or modification of security-critical code in AMD Zen allows an authorized attacker to disclose information locally.","status":"published","published":"2026-11-10T18:15:17Z","modified":"2026-11-12T21:42:28Z","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":"2026-11-11T00:25:05.012422Z"}],"ghsa":[{"id":"GHSA-xp4w-4whf-xg8h","title":"Processor optimization removal or modification of security-critical code in AMD Zen allows an...","description":"Processor optimization removal or modification of security-critical code in AMD Zen allows an authorized attacker to disclose information locally.","status":"published","published":"2026-11-10T21:33:56Z","modified":"2026-11-10T21:33:59Z","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":"2026-11-10T21:57:55.411542Z"}],"nvd":[{"id":"CVE-2026-84004","description":"Processor optimization removal or modification of security-critical code in AMD Zen allows an authorized attacker to disclose information locally.","status":"published","published":"2026-11-10T19:21:24.197Z","modified":"2026-11-11T02:17:15.953Z","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":"2026-11-11T07:23:51.286099Z"}]}}