Buffer overflow in IBM Datapower Gateway 10.5.0

CVE-2026-14269

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 heap-based buffer overflow, caused by improper bounds checking. An unauthenticated remote attacker could overflow the buffer and execute arbitrary code on the system.

Vulnerability class: Buffer Overflow

Published · last modified .

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

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-14269?
CVE-2026-14269 is a critical-severity vulnerability in IBM Datapower Gateway 10.5.0, classified under Heap-based Buffer Overflow. CVSS score: 9.8/10. Published 2026-10-08.
How severe is CVE-2026-14269?
Critical severity. CVSS v3 base score is 9.8 out of 10.