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9.8

IBM AIX and PowerVM VIOS could let attackers run code

CVE-2026-17040 · published 1 month ago
Summary

The AIX operating system versions 7.2 and 7.3, along with PowerVM VIOS version 4.1, contain a flaw that can be triggered from outside the network to run unwanted programs. This could let a malicious user take control of the affected servers. Apply the latest security patches from IBM as soon as possible to close the problem.

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
ibm powervm vios 4.1
Original advisory text
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 buffer overflow.
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 buffer overflow.
References
Severity
9.8 Critical
CVSS 3.1: 9.8 (MITRE)
Exploitation
EPSS <1%
Type
CWE-120Classic Buffer Overflow
Timeline
Published20 Aug 2026
Updated27 Sep 2026
First seen20 Aug 2026
Sources
CVE-2026-17040 · NVD
CVE-2026-17040 · MITRE
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