OpenBMC phosphor-net-ipmid RAKP Message 1 handler improper authentication

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$0-$5k0.81

Summaryinfo

A vulnerability categorized as very critical has been discovered in OpenBMC phosphor-net-ipmid. This affects the function RAKP Message 1 handler. Executing a manipulation can lead to improper authentication. This vulnerability is registered as CVE-2026-16141. It is possible to launch the attack remotely. No exploit is available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability has been found in OpenBMC phosphor-net-ipmid (affected version unknown) and classified as very critical. This vulnerability affects the function RAKP Message 1 handler. The manipulation with an unknown input leads to a improper authentication vulnerability. The CWE definition for the vulnerability is CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at runzero.com. This vulnerability was named CVE-2026-16141 since 07/17/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 09/15/2026).

Applying the patch ba6efc502e6b1fabb8ed1ca677ae5eedd64b6361 is able to eliminate this problem.

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.1
VulDB Meta Temp Score: 8.8

VulDB Base Score: 10.0
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 8.1
CNA Vector (runZero): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: ba6efc502e6b1fabb8ed1ca677ae5eedd64b6361

Timelineinfo

07/17/2026 CVE reserved
09/15/2026 +60 days Advisory disclosed
09/15/2026 +0 days VulDB entry created
09/15/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: runzero.com
Status: Confirmed

CVE: CVE-2026-16141 (🔒)
GCVE (CVE): GCVE-0-2026-16141
GCVE (VulDB): GCVE-100-404230

Entryinfo

Created: 09/15/2026 16:19
Changes: 09/15/2026 16:19 (62)
Complete: 🔍
Cache ID: 216::103

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