CVE-2026-16140

HIGH 8.8

OpenBMC IPMI Privilege Escalation via Retargeted RAKP 1

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

OpenBMC's IPMI implementation, phosphor-net-ipmid, is vulnerable to a logic flaw where the authorization context of an existing session can be replaced with a target account while still maintaining the original integrity and encryption keys. Several downstream vendors implement phosphor-net-ipmid as their IPMI stack, such as NVIDIA and H3C. This issue effectively allows for privilege escalation without re-authentication.

CWE	CWE-863
Vendor	openbmc
Product	phosphor-net-ipmid
Published	Sep 15, 2026
Last Updated	Sep 15, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

OpenBMC / phosphor-net-ipmid

0 ≤ ba6efc502e6b1fabb8ed1ca677ae5eedd64b6361

References

NVD ↗ CVE.org ↗ EPSS Data ↗

runzero.com: https://www.runzero.com/advisories/openbmc-ipmi-privsec-rakp-cve-2026-16140/ runzero.com: https://www.runzero.com/blog/lights-out-exposed/

Credits

HD Moore of runZero Gadi Evron of Knostic Tod Beardsley of runZero