EUVD-2026-63716
GHSA-pjqq-8r6c-4f8w
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
An unauthenticated remote authentication bypass yielding arbitrary command execution justifies AV:N/AC:L/PR:N/UI:N with full C/I/A impact.
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CVSS VectorVendor: us
Lifecycle Timeline
2DescriptionCVE.org
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary commands due to improper authentication.
AnalysisAI
Improper authentication in IBM AIX 7.2 and 7.3, and in IBM PowerVM VIOS 4.1, allows a remote attacker to execute arbitrary commands on affected systems. The flaw carries a critical CVSS 9.8 rating (network-reachable, no privileges or user interaction) and, per IBM's own PSIRT advisory, an authentication bypass can lead to full command execution. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector is AV:N/AC:L/PR:N/UI:N, indicating no special conditions - remote unauthenticated exploitation against network-reachable IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 instances. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H) describes a worst-case profile: network-exploitable, low complexity, no privileges, no user interaction, with total confidentiality, integrity, and availability impact - consistent with a remote unauthenticated command-execution authentication bypass. … 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 fix referenced in IBM's security advisory at https://www.ibm.com/support/pages/node/7283858; the input does not include an exact fix fileset or ifix number, so the specific patched version should be taken directly from that advisory (patch available per vendor advisory). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Immediately inventory all IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems in production and classify by criticality and network exposure. …
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OS command injection in IBM AIX 7.2 and 7.3 and PowerVM VIOS 4.1 lets a remote, low-privileged authenticated attacker ru
OS command injection in IBM AIX 7.2 and 7.3 and in IBM PowerVM VIOS 4.1 lets a remote, authenticated attacker execute ar
OS command injection in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 lets a remote authenticated attacker run arbitrary commands
Same weakness CWE-287 – Improper Authentication
View allSame technique Authentication Bypass
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External POC / Exploit Code
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