CVE-2026-86093: IBM DB2

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.5 could allow an attacker with the ability to control or impersonate a DRDA server endpoint to execute arbitrary commands on Db2 clients due to a stack-based buffer overflow that improperly copies user-controlled data into a fixed-size stack buffer without bounds checking.

Affected products

• IBM DB2: from 11.5, up to and including 11.5.9; from 12.1.0, up to and including 12.1.5

Published 2026-09-10. Last modified 2026-09-14.