What is CVE-2026-16956?

CVE-2026-16956 is a critical-severity vulnerability in IBM Db2 Mirror For I, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-08-12.

How severe is CVE-2026-16956?

Critical severity. CVSS v3 base score is 9.8 out of 10.

RCE in IBM Db2 Mirror For I

CVE-2026-16956

IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to execute arbitrary commands due to improper neutralization of special elements used in an OS command.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-08-12 · last modified 2026-08-13.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (56.8th percentile), scored 2026-09-27.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 57th percentile — 56.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.009 · change: -0.002

Affected products

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

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

www.ibm.com/support/pages/node/7283281 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-16956?: CVE-2026-16956 is a critical-severity vulnerability in IBM Db2 Mirror For I, classified under OS Command Injection. CVSS score: 9.8/10. Published 2026-08-12.
How severe is CVE-2026-16956?: Critical severity. CVSS v3 base score is 9.8 out of 10.