EUVD-2026-63640
GHSA-37v2-9grx-pwq4
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Unauthenticated network RCE justifies C/I/A:H, but exploiting a certificate-validation flaw realistically needs a man-in-the-middle position, so AC:H rather than AC:L.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
6DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to improper certificate validation.
AnalysisAI
Remote code execution in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 stems from improper certificate validation (CWE-295), allowing a remote attacker to execute arbitrary code without authentication. Because the flawed TLS/certificate trust check can be abused over the network, an attacker positioned to intercept or impersonate a trusted endpoint could deliver a malicious payload to the affected component. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The specific prerequisite is improper certificate validation (CWE-295) in a TLS-using component of AIX/VIOS, meaning the practical condition is an attacker able to intercept or impersonate a certificate-authenticated peer that the affected system communicates with - i.e., a man-in-the-middle or trusted-endpoint-impersonation position on the network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are partly conflicting and should be weighed together. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Apply the vendor fix: a patch is available per IBM's advisory, so download and install the fixes IBM references at https://www.ibm.com/support/pages/node/7283858 for the affected AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1 fileset levels (the bulletin lists the exact APAR/ifix and fileset versions to apply - no specific fix version number was provided in this dataset, so confirm the precise level from that bulletin before deployment). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems and notify infrastructure owners of patch requirements. …
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Same weakness CWE-295 – Improper Certificate Validation
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External POC / Exploit Code
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