EUVD-2026-63712
GHSA-4x62-vxrg-5r3p
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor describes remote unauthenticated code execution via format string, matching AV:N/AC:L/PR:N/UI:N with full C/I/A impact; unnamed service prevents lowering AV, so I retain network vector.
Primary rating from Vendor (us).
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 code due to a format string vulnerability.
AnalysisAI
Remote code execution in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 arises from a format string weakness (CWE-134) that a remote, unauthenticated attacker can leverage to run arbitrary code, per the CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) scoring 9.8 critical. IBM PSIRT is the reporting source and a single vendor support advisory is referenced; there is no public exploit identified at time of analysis and the CVE is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector (AV:N/AC:L/PR:N/UI:N) indicates no authentication and no user interaction are required and the attack is remote and low-complexity against the affected AIX 7.2/7.3 and VIOS 4.1 releases. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | Multiple raw signals point to high priority: the CVSS 3.1 base score is 9.8 with a fully remote, low-complexity, no-privilege, no-interaction vector (AV:N/AC:L/PR:N/UI:N) and high impact to confidentiality, integrity, and availability. … 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 IBM's fix as described in the referenced advisory at https://www.ibm.com/support/pages/node/7283858 (IBM support node 7283858); no exact patched fileset version was included in the input, so the status is best described as patch available per vendor advisory rather than a confirmed version number - obtain the specific APAR/iFix and Technology Level from that page. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: inventory all IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems in production and confirm patch status with IBM support-document the affected versions and network locations. …
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Same weakness CWE-134 – Use of Externally-Controlled Format String
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External POC / Exploit Code
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