CVE WatchSep 15, 2026

CVE-2026-16141

OpenBMC's IPMI implementation, phosphor-net-ipmid, contains a logic flaw in which an unauthenticated client can force the RAKP Message 1 han

CVSS

8.1

High

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 15, 2026 · Last modified: Sep 15, 2026 · CWE-457 · CWE-798

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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