CVE-2026-14991: IBM Datapower Gateway 10.5.0

Critical severity, CVSS 9.8. EPSS: 0.4% chance of exploitation in the next 30 days.

IBM DataPower Gateway 10.5.0.0 through 10.5.0.22, 10.6.1 through 10.6.6, 10.6.0.0 through 10.6.0.10, and 11.0.0.0 through 11.0.0.2 is vulnerable to a buffer overflow, caused by improper bounds checking. A local user could overflow the buffer and execute arbitrary code on the system.

Affected products

• IBM Datapower Gateway 10.5.0: from 10.5.0.0, up to and including 10.5.0.22
• IBM Datapower Gateway 10.6.0: from 10.6.0.0, up to and including 10.6.0.10
• IBM Datapower Gateway 10.6cd: from 10.6.1, up to and including 10.6.6
• IBM Datapower Gateway 11.0.0: from 11.0.0.0, up to and including 11.0.0.2

Published 2026-10-08. Last modified 2026-10-10.