What is CVE-2026-16660?

CVE-2026-16660 is a medium-severity vulnerability in IBM Db2 Mirror For I, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-09-04.

How severe is CVE-2026-16660?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Out-of-bounds Read in IBM Db2 Mirror For I

CVE-2026-16660

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to cause a denial of service due to an out-of-bounds read.

Vulnerability class: Buffer Overflow

Published 2026-09-04 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.004 (27.9th percentile), scored 2026-10-20.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 27.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

IBM Db2 Mirror For I — versions 7.4, 7.5, 7.6
IBM Db2 Mirror For I

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

www.ibm.com/support/pages/node/7285904 (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-16660?: CVE-2026-16660 is a medium-severity vulnerability in IBM Db2 Mirror For I, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-09-04.
How severe is CVE-2026-16660?: Medium severity. CVSS v3 base score is 5.3 out of 10.