What is CVE-2026-16865?

CVE-2026-16865 is a high-severity vulnerability in IBM Aix, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-19.

How severe is CVE-2026-16865?

High severity. CVSS v3 base score is 8.8 out of 10.

RCE in IBM Aix

CVE-2026-16865

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to execute arbitrary code due to command injection.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-08-19 · last modified 2026-08-22.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.2th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.ibm.com/support/pages/node/7283858 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-16865?: CVE-2026-16865 is a high-severity vulnerability in IBM Aix, classified under OS Command Injection. CVSS score: 8.8/10. Published 2026-08-19.
How severe is CVE-2026-16865?: High severity. CVSS v3 base score is 8.8 out of 10.