What is CVE-2026-16926?

CVE-2026-16926 is a critical-severity vulnerability in IBM Aix, classified under External Control of File Name or Path. CVSS score: 9.1/10. Published 2026-08-20.

How severe is CVE-2026-16926?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in IBM Aix

CVE-2026-16926

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to overwrite arbitrary files due to improper neutralization of special elements in input.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

Affected products

Ibm Aix — versions 7.2, 7.3
Ibm Powervm Vios — versions 4.1

Weakness classification (CWE)

CWE-73 — External Control of File Name or Path

References

psirt@us.ibm.com (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-16926?: CVE-2026-16926 is a critical-severity vulnerability in IBM Aix, classified under External Control of File Name or Path. CVSS score: 9.1/10. Published 2026-08-20.
How severe is CVE-2026-16926?: Critical severity. CVSS v3 base score is 9.1 out of 10.