CVE-2026-18832: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-18832 is a high-severity vulnerability in IBM AIX versions 7.2 and 7.3, and IBM PowerVM VIOS 4.1. It involves a heap-based buffer overflow that could allow a remote attacker to execute arbitrary code without requiring user interaction or privileges.
CVSS v3.1
Score 8.8high
Affected software
IBM
AIX
IBM
PowerVM VIOS
cpe:2.3:a:ibm:aix:7.2:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.2.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3:*:*:*:*:*:*:*cpe:2.3:a:ibm:aix:7.3.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1:*:*:*:*:*:*:*cpe:2.3:a:ibm:powervm_vios:4.1.0:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CWE-787 (Out-of-bounds Write), affects IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1. It allows a remote attacker to exploit a heap-based buffer overflow to execute arbitrary code. The CVSS 3.1 base score is 8.8, reflecting high impact on confidentiality, integrity, and availability. The attack vector is adjacent network (AV:A), with low attack complexity (AC:L), no privileges required (PR:N), and no user interaction (UI:N). The scope is unchanged (S:U).
Potential Impact
Successful exploitation could lead to full compromise of affected systems, including arbitrary code execution with potentially severe consequences to confidentiality, integrity, and availability of the system. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or patch links are provided in the available data. Users should monitor IBM's security advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-04T14:21:39.143Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a877ac7acd9273b493025f8
Added to database: 08/20/2026, 22:08:07 UTC
Last enriched: 09/10/2026, 19:47:15 UTC
Last updated: 10/05/2026, 06:48:14 UTC
Views: 68
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