EUVD-2026-62524
GHSA-9fvh-889m-pf59
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Adjacent-network vector is consistent with a datacenter service not exposed to the internet; unauthenticated heap RCE yields full CIA impact on the vulnerable system with no scope change.
Primary rating from Vendor (ibm).
CVSS VectorVendor: ibm
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 heap buffer overflow.
AnalysisAI
Heap buffer overflow in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 enables unauthenticated remote code execution by attackers positioned on an adjacent network segment, with no user interaction required. The flaw (CWE-787, out-of-bounds write) results in full compromise of confidentiality, integrity, and availability of the affected system. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the attacker to be on an adjacent network segment - the same physical LAN, VLAN, or logical network as the target IBM AIX 7.2/7.3 or PowerVM VIOS 4.1 system, per the CVSS AV:A metric. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 8.8 with vector AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H is internally consistent with the described vulnerability: heap RCE without authentication and without user interaction delivers full CIA impact. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with access to the same network segment as the IBM Power system - achieved via insider access, a compromised host on the same VLAN, or lateral movement from an earlier foothold - sends a specially crafted network payload to the vulnerable AIX or VIOS service. The malformed input overflows a heap-allocated buffer, corrupting adjacent memory and redirecting execution to attacker-controlled code running at the privilege level of the affected process. … |
| Remediation | Patch available per vendor advisory: administrators should consult the IBM security bulletin at https://www.ibm.com/support/pages/node/7283858 for the specific APARs, interim fixes, or technology level updates applicable to IBM AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1, and apply the appropriate fix as soon as operationally feasible. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all systems running IBM AIX 7.2, IBM AIX 7.3, and IBM PowerVM VIOS 4.1, particularly those exposed to adjacent network segments. …
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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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