{"id":"CVE-2026-16141","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-16141","generatedAt":"2026-10-28T04:35:29.271Z","title":"OpenBMC's IPMI implementation, phosphor-net-ipmid, contains a logic flaw in which an unauthenticated client can force the RAKP Message 1 handler to return before it overwrites the authentication object's constructor defaults.","description":"OpenBMC's IPMI implementation, phosphor-net-ipmid, contains a logic flaw in which an unauthenticated client can force the RAKP Message 1 handler to return before it overwrites the authentication object's constructor defaults. The IPMI service then accepts a RAKP Message 3 whose HMAC is computed with the constant 20-byte 'userKey' initialized from the string '0penBmc' and an often-predictable 'bmcRandomNum'. Several downstream vendors implement phosphor-net-ipmid as their IPMI stack, such as NVIDIA and H3C.","published":"2026-09-15T14:16:50.000Z","lastModified":"2026-09-18T19:30:43.000Z","status":"Awaiting Analysis","sourceIdentifier":"44488dab-36db-4358-99f9-bc116477f914","cvss":{"version":"3.1","score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-457","CWE-798"],"affected":[],"epss":{"score":0.00537,"percentile":0.45047,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.54%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://www.runzero.com/advisories/openbmc-ipmi-auth-bypass-rakp-cve-2026-16141/","source":"44488dab-36db-4358-99f9-bc116477f914"},{"url":"https://www.runzero.com/blog/lights-out-exposed/","source":"44488dab-36db-4358-99f9-bc116477f914"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-16141","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."}