EUVD-2026-62873
GHSA-fvfc-rh3q-hmjf
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Local vector and low-privilege requirement reflect a local authenticated user injecting metacharacters; full C/I/A impact consistent with arbitrary OS command execution potential.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to execute arbitrary commands due to shell metacharacter injection.
AnalysisAI
Shell metacharacter injection in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 allows a local low-privileged attacker to execute arbitrary OS commands, resulting in complete confidentiality, integrity, and availability compromise per CVSS C:H/I:H/A:H. The root cause (CWE-78) is insufficient sanitization of special shell characters passed to an OS interpreter within an IBM-provided utility or script. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Local OS-level access with a low-privilege account on IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 is required, confirmed by CVSS AV:L/PR:L. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H rates this as High (7.8), and the full impact triad warrants serious attention for any organization running AIX or PowerVM. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A low-privileged user with a local shell account on an IBM AIX or PowerVM VIOS system provides crafted input - containing shell metacharacters such as a semicolon followed by a malicious command - to a vulnerable IBM utility or administrative script that passes the input unsanitized to a shell interpreter. If the vulnerable component executes with elevated privileges (for example, as root via a setuid binary or a privileged system script), the injected command inherits those privileges, enabling full system compromise including reading sensitive files, modifying system configuration, or establishing persistence. … |
| Remediation | IBM has released a patch per its security advisory at https://www.ibm.com/support/pages/node/7283858; administrators should consult this advisory to identify and apply the specific APARs or PTFs applicable to their AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1 maintenance level. … 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 across the enterprise and assess business criticality and data sensitivity of each instance. …
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Same weakness CWE-78 – OS Command Injection
View allSame technique Command Injection
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External POC / Exploit Code
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