EUVD-2026-62733
GHSA-h878-5fmm-j2cm
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Adjacent vector confirmed by AV:A; PR:N because no authentication is required; full C/I/A impact reflects arbitrary OS command execution capability.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:A/AC:L/PR:N/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 remote attacker to execute arbitrary commands due to improper neutralization of special elements used in an OS command.
AnalysisAI
OS command injection in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 enables an unauthenticated attacker with adjacent network access to execute arbitrary operating system commands without any user interaction. The flaw (CWE-78) resides in a network-exposed component that fails to neutralize shell metacharacters before incorporating user-supplied input into OS commands, granting full confidentiality, integrity, and availability impact. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must have adjacent network access (layer-2 or routed layer-3 adjacency such as same LAN, VLAN, or VPN segment) to a host running IBM AIX 7.2, AIX 7.3, or PowerVM VIOS 4.1. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 score of 8.8 with AV:A/AC:L/PR:N/UI:N is a high-severity signal: no privileges or user interaction are required and attack complexity is low, but the adjacent network vector meaningfully constrains internet-scale exposure compared to a fully routable AV:N flaw. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker positioned on the same LAN or VLAN as an IBM AIX or PowerVM VIOS system sends a crafted network request to a vulnerable service, embedding shell metacharacters in the input payload. The service constructs an OS command incorporating the unsanitized attacker input and passes it to the shell, executing the injected commands in the security context of the service process. … |
| Remediation | Apply the vendor-released fix as documented in the IBM support advisory at https://www.ibm.com/support/pages/node/7283858, which provides specific APARs and fix packs for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and inventory all systems running IBM AIX 7.2, 7.3, or PowerVM VIOS 4.1 to establish your complete patch scope. …
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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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