CVE-2026-16841: CWE-787 Out-of-bounds Write in IBM AIX
Description
CVE-2026-16841 is a high-severity vulnerability in IBM AIX versions 7.2 and 7.3, as well as IBM PowerVM VIOS 4.1. It involves a stack buffer overflow that could allow a remote attacker to execute arbitrary code without requiring user interaction or privileges. The vulnerability is classified as an out-of-bounds write (CWE-787).
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 affects IBM AIX 7.2, 7.3, and IBM PowerVM VIOS 4.1, where a stack buffer overflow condition exists. An attacker with network access could exploit this flaw to execute arbitrary code remotely. The CVSS v3.1 base score is 8.8, indicating high severity, with attack vector as adjacent network, low attack complexity, no privileges required, and no user interaction needed. The vulnerability impacts confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could lead to remote code execution, compromising system confidentiality, integrity, and availability. This could allow an attacker to fully control affected systems remotely.
Mitigation Recommendations
No patch or remediation information is currently provided. Patch status is not yet confirmed — check IBM's official advisory for current remediation guidance before taking action.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T03:03:02.484Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a86098facd9273b498b4bfb
Added to database: 08/19/2026, 19:52:47 UTC
Last enriched: 09/11/2026, 06:02:26 UTC
Last updated: 10/04/2026, 10:02:25 UTC
Views: 33
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