EUVD-2026-62828
GHSA-v8j7-x5rv-cr35
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Adjacent-network vector confirmed by description; no privileges or interaction required; full RCE yields high CIA impact with unchanged scope.
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 an out-of-bounds write.
AnalysisAI
Out-of-bounds write in IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 enables an unauthenticated attacker positioned on an adjacent network segment to execute arbitrary code with full confidentiality, integrity, and availability impact. The CWE-787 class flaw requires no privileges and no user interaction, lowering the exploitation bar substantially once network adjacency is achieved. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Adjacent network access is required - the attacker must be on the same local network segment, VLAN, or directly routable subnet as the target AIX or VIOS system (AV:A per CVSS). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The official CVSS 3.1 score of 8.8 (AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) reflects a high-severity flaw constrained primarily by the adjacent-network attack vector rather than full internet exposure. … 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 | Consult and apply the fix documented in the IBM security advisory at https://www.ibm.com/support/pages/node/7283858. … 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; immediately implement firewall rules to restrict network access to these systems from untrusted adjacent network segments. …
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Improper authentication in IBM AIX 7.2 and 7.3, and in IBM PowerVM VIOS 4.1, allows a remote attacker to execute arbitra
Remote code execution in IBM AIX 7.2 and 7.3 (and IBM PowerVM VIOS 4.1) stems from a stack-based buffer overflow that le
Remote code execution in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stems from a buffer overflow (out-of-bounds write) that a
Remote code execution in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stems from a buffer overflow (out-of-bounds write) that a
Remote code execution in IBM AIX 7.2 and 7.3, and IBM PowerVM VIOS 4.1, stems from a stack-based buffer overflow (CWE-78
Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Memory Corruption
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External POC / Exploit Code
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