EUVD-2026-62756
GHSA-mm39-wv8x-4288
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description states a remote attacker can execute arbitrary code via a stack overflow with no stated auth or interaction, so AV:N/AC:L/PR:N/UI:N with full C/I/A impact.
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 a stack-based buffer overflow.
AnalysisAI
Remote code execution in IBM AIX 7.2/7.3 and IBM PowerVM VIOS 4.1 stems from a stack-based buffer overflow (CWE-121) that a network attacker can trigger without authentication or user interaction. Because the flaw carries a CVSS 9.8 with an AV:N/AC:L/PR:N/UI:N vector, a successful attack yields full compromise of confidentiality, integrity, and availability on affected enterprise UNIX hosts and virtualization I/O servers. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVSS vector AV:N/AC:L/PR:N/UI:N, exploitation requires only network access to a vulnerable service on IBM AIX 7.2/7.3 or PowerVM VIOS 4.1, with no authentication and no user interaction. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals align toward high priority: the CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H (base 9.8), meaning remote, low-complexity, unauthenticated exploitation with total system impact, and a vendor patch is available - so the fix window is open and defenders should move. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network reachability to a vulnerable AIX or VIOS host sends a crafted request to the affected network service, overflowing a stack buffer and overwriting the return address to execute attacker-controlled shellcode. Given AV:N/AC:L/PR:N/UI:N, this requires no credentials and no user interaction, yielding code execution at the privilege level of the vulnerable service. … |
| Remediation | Patch available per vendor advisory: apply the IBM-provided fix documented at https://www.ibm.com/support/pages/node/7283858, which covers AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1 - the input does not disclose an exact patched build string, so pull the precise APAR/interim-fix or service-pack level from that page rather than assuming a version. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, conduct a complete inventory of IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems across production and non-production environments and identify which systems are network-accessible. …
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Same weakness CWE-121 – Stack-based Buffer Overflow
View allSame technique Stack Overflow
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External POC / Exploit Code
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