EUVD-2026-62745
GHSA-q2cr-mw65-vf8v
Severity by source
AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
RA processing is automatic and unauthenticated at the OS network stack level; AV:A reflects L2-scoped ICMPv6 delivery; RCE with elevated privileges justifies C:H/I:H/A:H.
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 code due to command injection via crafted Router Advertisements.
AnalysisAI
Remote code execution in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 is achievable by an unauthenticated attacker on the same network segment via command injection triggered by crafted IPv6 Router Advertisement messages. The vulnerability (CWE-269, Improper Privilege Management) implies the RA processing subsystem executes injected commands with elevated OS-level privileges, enabling full confidentiality, integrity, and availability compromise of the affected host. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The attacker must be adjacent to the target on the same IPv6-capable Layer 2 network segment (broadcast domain or VLAN) - this is the defining constraint. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 8.8 score with AV:A correctly reflects that the attack is constrained to the same Layer 2 broadcast domain - requiring either physical co-location, a compromised adjacent host, or the ability to inject rogue ICMPv6 RA packets. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker who has compromised a host on the same VLAN as an IBM AIX or PowerVM VIOS system - or who connects a rogue device to the same datacenter switch - crafts a malicious ICMPv6 Router Advertisement embedding command injection payloads in fields processed by the AIX RA handler. The AIX network stack automatically processes the RA upon receipt without authentication, executing the injected command with elevated privileges and granting the attacker arbitrary code execution on the target. … |
| Remediation | Apply the vendor-released patch 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: Identify and inventory all IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 instances; document network connectivity and data sensitivity; establish communication channel with infrastructure teams. …
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Same weakness CWE-269 – Improper Privilege Management
View allSame technique Command Injection
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External POC / Exploit Code
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