EUVD-2026-63385
GHSA-cf48-6hxp-vrcr
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local attack vector and low-privilege requirement reflect mandatory authenticated local shell access; full C/I/A impact consistent with root-level privilege escalation on a single system.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
5DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to achieve privilege escalation due to improper authorization.
AnalysisAI
Privilege escalation on IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 allows any low-privileged local user to gain full system control by exploiting improper authorization checks (CWE-285). SSVC rates the technical impact as total, consistent with the CVSS C:H/I:H/A:H rating, meaning a successful attacker achieves complete compromise of confidentiality, integrity, and availability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must hold an existing low-privileged authenticated local account on a vulnerable IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system, confirmed by AV:L and PR:L in the CVSS vector. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High score is well-calibrated: AV:L constrains this to systems where the attacker already holds a local account, while AC:L and PR:L indicate no special conditions beyond that baseline are required. … 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 | A vendor-released patch is available from IBM; consult the Security Bulletin at https://www.ibm.com/support/pages/node/7283858 for the specific AIX Technology Level (TL) or PowerVM VIOS fix pack that resolves the flaw. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct an asset inventory to identify all IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems and categorize by business criticality. …
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Same weakness CWE-285 – Improper Authorization
View allSame technique Privilege Escalation
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External POC / Exploit Code
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