EUVD-2026-62729
GHSA-w74v-4vvf-qm9c
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Vendor describes remote unauthenticated RCE via out-of-bounds write with no user interaction, so AV:N/AC:L/PR:N/UI:N and full C/I/A impact are consistent.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:N/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 an out-of-bounds write.
AnalysisAI
Remote code execution in IBM AIX 7.2 and 7.3 and IBM PowerVM VIOS 4.1 allows a remote attacker to run arbitrary code by triggering an out-of-bounds write (CWE-787) in an affected component. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N) indicates the flaw is reachable over the network by unauthenticated attackers with low complexity, yielding full compromise of confidentiality, integrity, and availability. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | No special conditions per the CVSS vector - remote, unauthenticated exploitation (AV:N/AC:L/PR:N/UI:N) is described against IBM AIX 7.2/7.3 and PowerVM VIOS 4.1, requiring only network access to the vulnerable service with no authentication or user interaction. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals point to a high-priority issue: the CVSS 3.1 base score is 9.8 (Critical) with a fully remote, unauthenticated, low-complexity vector and total C/I/A impact, and a vendor patch is available, meaning defenders can act immediately. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network reachability to an exposed AIX or VIOS service sends a crafted request whose malformed length or field triggers the out-of-bounds write, corrupting memory to hijack execution and run arbitrary code on the host - no credentials or user interaction are required given the AV:N/PR:N/UI:N vector. A successful hit on a VIOS server is especially damaging because it can cascade to the LPARs whose storage and networking it brokers. … |
| Remediation | Patch available per vendor advisory - apply the IBM-provided fix/interim fix (ifix) documented at https://www.ibm.com/support/pages/node/7283858 for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1; the advisory lists the exact APAR and ifix packages per Technology Level, which should be applied since no specific patched version string was included in this intelligence. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all IBM AIX 7.2, 7.3, and PowerVM VIOS 4.1 systems in your environment and restrict network access to essential connections only. …
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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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