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9.9

IBM AIX and PowerVM VIOS Command Injection Risk

CVE-2026-16816 · published 15 days ago
Summary

IBM AIX and PowerVM VIOS have a security weakness that allows a malicious user to execute unauthorized commands on the system. This could potentially lead to unauthorized access or data tampering. IBM should be contacted to determine if a patch is available to fix this issue.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
ibm aix 7.2
>= 7.2.5, <= 7.2.5.212
>= 7.3.2, <= 7.3.2.5
>= 7.3.3, <= 7.3.3.2
>= 7.3.4, <= 7.3.4.1
ibm powervm vios 4.1
ibm vios >= 4.1.0, < 4.1.0.50
>= 4.1.1.0, < 4.1.1.30
>= 4.1.2.0, < 4.1.2.20
cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*
Original advisory text
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to execute arbitrary commands due to improper neutralization of special elements used in an OS command.
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to execute arbitrary commands due to improper neutralization of special elements used in an OS command.
References
Severity
9.9 Critical
CVSS 3.1: 9.9 (NVD)
Exploitation
EPSS <1%
Type
CWE-78OS Command Injection
Timeline
Published19 Aug 2026
Updated3 Sep 2026
First seen19 Aug 2026
Sources
CVE-2026-16816 · NVD
CVE-2026-16816 · MITRE
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