What is CVE-2026-16964?

CVE-2026-16964 is a medium-severity vulnerability in IBM Aix, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-08-20.

How severe is CVE-2026-16964?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Information disclosure in IBM Aix

CVE-2026-16964

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to intercept messages and forge replies due to the exposure of sensitive information.

Vulnerability class: Information Disclosure

Published 2026-08-20 · last modified 2026-08-25.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.003 (25.5th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 25.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001

Affected products

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

Weakness classification (CWE)

CWE-200 — Information Disclosure

References

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

Frequently asked questions

What is CVE-2026-16964?: CVE-2026-16964 is a medium-severity vulnerability in IBM Aix, classified under Information Disclosure. CVSS score: 6.5/10. Published 2026-08-20.
How severe is CVE-2026-16964?: Medium severity. CVSS v3 base score is 6.5 out of 10.