EUVD-2026-63618
GHSA-fx8v-x5f2-72jq
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local access and low-privilege account required to plant symlink; no user interaction needed; full system impact after escalation with no scope change.
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 gain elevated privileges due to improper resolution of symbolic links.
AnalysisAI
Privilege escalation in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 allows a local low-privileged attacker to gain elevated system access by exploiting improper symbolic link resolution (CWE-59). The CVSS 7.8 High score reflects full confidentiality, integrity, and availability impact on successful exploitation, though the local attack vector (AV:L) and low EPSS of 0.17% (7th percentile) substantially constrain real-world risk. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires authenticated local access with at minimum a low-privilege user account, as confirmed by the CVSS vector (AV:L/PR:L). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 7.8 High vector (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) correctly captures the full post-exploitation impact but is bounded by the local attack vector, meaning an adversary must already hold authenticated shell access before this flaw can be leveraged - it cannot be triggered remotely. … 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-released patch available through the IBM support portal at https://www.ibm.com/support/pages/node/7283858. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems in your environment and assess which have multiple local users or untrusted system access; check IBM support portal for the latest available patch for your specific version. …
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Same weakness CWE-59 – Improper Link Resolution Before File Access
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External POC / Exploit Code
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