What is CVE-2026-18716?

CVE-2026-18716 is a high-severity vulnerability in IBM Aix, classified under Out-of-bounds Read. CVSS score: 7.9/10. Published 2026-08-20.

How severe is CVE-2026-18716?

High severity. CVSS v3 base score is 7.9 out of 10.

Out-of-bounds Read in IBM Aix

CVE-2026-18716

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote authenticated attacker to obtain sensitive information or cause a denial of service due to an out-of-bounds read.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 7.9 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H.

EPSS exploit prediction

EPSS: 0.003 (19.3th percentile), scored 2026-10-06.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 19th percentile — 19.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

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

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

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

Frequently asked questions

What is CVE-2026-18716?: CVE-2026-18716 is a high-severity vulnerability in IBM Aix, classified under Out-of-bounds Read. CVSS score: 7.9/10. Published 2026-08-20.
How severe is CVE-2026-18716?: High severity. CVSS v3 base score is 7.9 out of 10.