{"id":"CVE-2026-20901","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-20901","generatedAt":"2026-10-28T00:07:50.074Z","title":"Improper input validation for some Intel(R) Xeon(R) processors within firmware may allow an escalation of privilege.","description":"Improper input validation for some Intel(R) Xeon(R) processors within firmware may allow an escalation of privilege. Startup code and smm adversary with a privileged user combined with a high complexity attack may enable data alteration. This result may potentially occur via local access when attack requirements are present without special internal knowledge and requires no user interaction. The potential vulnerability may impact the confidentiality (none), integrity (none) and availability (none) of the vulnerable system, resulting in subsequent system confidentiality (none), integrity (high) and availability (none) impacts.","published":"2026-08-11T18:17:25.000Z","lastModified":"2026-08-28T14:08:04.000Z","status":"Analyzed","sourceIdentifier":"secure@intel.com","cvss":{"version":"4.0","score":4,"severity":"MEDIUM","vector":"CVSS:4.0/AV:L/AC:H/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-20"],"affected":["intel/xeon bronze 3408u firmware","intel/xeon gold 5403n firmware","intel/xeon gold 5411n firmware","intel/xeon gold 5412u firmware","intel/xeon gold 5415\\+ firmware","intel/xeon platinum 8592\\+ firmware","intel/xeon platinum 8592v firmware","intel/xeon platinum 8593q firmware","intel/xeon silver 4509y firmware","intel/xeon silver 4510 firmware","intel/xeon silver 4510t firmware","intel/xeon silver 4514y firmware","intel/xeon silver 4516y\\+ firmware","intel/xeon gold 5416s firmware","intel/xeon gold 5418n firmware","intel/xeon gold 5418y firmware","intel/xeon gold 5420\\+ firmware","intel/xeon gold 5423n firmware","intel/xeon gold 5433n firmware","intel/xeon gold 6403n firmware","intel/xeon gold 6414u firmware","intel/xeon gold 6416h firmware","intel/xeon gold 6418h firmware","intel/xeon gold 6421n firmware","intel/xeon gold 6423n firmware","intel/xeon gold 6426y firmware","intel/xeon gold 6428n firmware","intel/xeon gold 6430 firmware","intel/xeon gold 6433n firmware","intel/xeon gold 6433ne firmware","intel/xeon gold 6434 firmware","intel/xeon gold 6434h firmware","intel/xeon gold 6438m firmware","intel/xeon gold 6438n firmware","intel/xeon gold 6438y\\+ firmware","intel/xeon gold 6442y firmware","intel/xeon gold 6443n firmware","intel/xeon gold 6444y firmware","intel/xeon gold 6448h firmware","intel/xeon gold 6448y firmware","intel/xeon gold 6454s firmware","intel/xeon gold 6458q firmware","intel/xeon platinum 8444h firmware","intel/xeon platinum 8450h firmware","intel/xeon platinum 8452y firmware","intel/xeon platinum 8454h firmware","intel/xeon platinum 8458p firmware","intel/xeon platinum 8460h firmware","intel/xeon platinum 8460y\\+ firmware","intel/xeon platinum 8461v firmware","intel/xeon platinum 8462y\\+ firmware","intel/xeon platinum 8468 firmware","intel/xeon platinum 8468h firmware","intel/xeon platinum 8468v firmware","intel/xeon platinum 8470 firmware","intel/xeon platinum 8470n firmware","intel/xeon platinum 8470q firmware","intel/xeon platinum 8471n firmware","intel/xeon platinum 8480\\+ firmware","intel/xeon platinum 8490h firmware"],"epss":{"score":0.00097,"percentile":0.00715,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.10%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://intel.com/content/www/us/en/security-center/advisory/intel-sa-01442.html","tags":["Vendor Advisory"],"source":"secure@intel.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-20901","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}