CVE-2026-14988 is a buffer overflow in IBM DataPower Gateway, rated 6.5 (medium). The record classes it as an out of bounds read. Upgrade to 10.5.0.23, 10.6.0.11 or 11.0.0.3, whichever matches your version line. IBM lists no workaround, so patching is the only remedy it describes.
What's affected
- Product: IBM DataPower Gateway.
- Affected: 10.5.0.0 through 10.5.0.22, 10.6.0.0 through 10.6.0.10, 10.6.1 through 10.6.6 (the 10.6 continuous delivery line), and 11.0.0.0 through 11.0.0.2.
- Fixed: 11.0.0.3 for the 10.6 continuous delivery line and for 11.0.0.0 through 11.0.0.2, 10.6.0.11 for the 10.6.0 line, and 10.5.0.23 for the 10.5.0 line.
- Bulletin: IBM's security bulletin of 28 September 2026 covers several DataPower CVEs at once and lists a known issue, DT499224. It lists no workarounds.
- Severity: 6.5 with the record's CWE-125 (out of bounds read). Not on the CISA Known Exploited Vulnerabilities list.
How to check if you're exposed
Check the firmware version on each appliance or virtual instance. In the DataPower command line, run:
show version
The web management interface shows the same information on its status pages. Compare the result with the ranges above. Include development, test and disaster recovery instances, which tend to lag production.
Also list which interfaces the gateway exposes and to whom. A gateway on the edge of your network is the whole point of the product, so assume the services it publishes are reachable from outside, and ask which of them handle traffic that an unauthenticated client can send.
What to do now
- List every DataPower Gateway with its version and where it sits in your network.
- Upgrade to the fixed release for your line: 11.0.0.3, 10.6.0.11 or 10.5.0.23.
- Read the bulletin's known issue note, DT499224, before the upgrade so the change plan covers it.
- Plan for the same maintenance window to cover all the DataPower CVEs in the bulletin, not just this one.
- Review gateway logs for crashes or restarts around the time before the upgrade.
Why it matters
An out of bounds read (CWE-125) happens when a program reads past the end of a buffer. The usual results are a crash, or disclosure of whatever data sits next to the buffer in memory. IBM's description of this CVE is only that the product is vulnerable to buffer overflow, so the record's weakness classification is the best guide to the behavior.
IBM does not say what an attacker would gain. Keep your wording the same in tickets: the vendor confirms the flaw and the fix, and says nothing more about impact.
The practical answer is the same as for the other DataPower CVEs in the bulletin. Find each gateway, check its version, and upgrade to the release that matches its line.
Quick check
What does IBM say the impact is?
The description says only that the product is vulnerable to buffer overflow. The record classifies the weakness as an out of bounds read.
Which release fixes it?
10.5.0.23, 10.6.0.11 or 11.0.0.3, depending on the version line.
Sources
Last reviewed: 19 October 2026.
