EUVD-2026-62428
GHSA-pm34-h6p9-7p29
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
TLS certificate impersonation requires network positioning (AC:H); no prior credentials are needed to exploit the certificate validation failure (PR:N); availability is unaffected.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 NIM could allow a remote attacker to gain unauthorized access to AIX systems due to improper validation of TLS certificates.
AnalysisAI
Improper TLS certificate validation in the NIM (Network Installation Management) subsystem of IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1 enables remote attackers to gain unauthorized access to AIX systems by exploiting the failure to verify certificate authenticity during NIM communications. The CVSS 8.1 High score reflects high confidentiality and integrity impact across a network-exploitable path with low complexity and no user interaction required. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the NIM (Network Installation Management) service to be active and reachable on the target system - NIM must be deployed and in operational use for the TLS certificate exchange to occur. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.1 High rating reflects a network-accessible (AV:N), low-complexity (AC:L) flaw with high confidentiality and integrity impact and no availability impact, which is a profile that warrants prompt attention in any IBM AIX or PowerVM environment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-level access to the IBM AIX management network positions themselves between a NIM client and the NIM master server, intercepting the TLS handshake and presenting a fraudulent certificate that the NIM client accepts without proper validation due to the CWE-295 flaw. The attacker then conducts a man-in-the-middle session, injecting malicious NIM commands, configuration, or installation payloads that result in unauthorized access to the target AIX system. … |
| Remediation | A vendor-released patch is confirmed available per IBM's advisory at https://www.ibm.com/support/pages/node/7283858; administrators running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 should consult that page immediately to identify the applicable fix package and apply it. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, distribute this security alert to infrastructure, systems, and IBM Power engineering teams and identify all AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems in your environment, prioritizing those exposed to untrusted networks. …
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Same weakness CWE-295 – Improper Certificate Validation
View allSame technique Authentication Bypass
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External POC / Exploit Code
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