External risk intelligence

IBM DataPower Gateway Heap Buffer Overflow Vulnerability.

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-14269

IBM DataPower Gateway is an enterprise-grade internet edge gateway, API gateway, and integration appliance. It is designed specifically to be deployed at the network edge to handle, process, and secure incoming public-facing traffic, making it a quintessentially public-facing service in standard deployments.

Buffer Overflow

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in IBM DataPower Gateway affecting multiple versions, which could allow an unauthenticated remote attacker to execute arbitrary code on the system by exploiting a buffer overflow. This issue is particularly concerning because DataPower Gateways are typically deployed at the network edge, handling significant public-facing traffic.

Unauthenticated attackers can run their own code.
Protects critical network edge and integration functions.
Confirm relevance; critical edge exposure is a concern.

Attack Path

How an attacker could exploit the issue

An unauthenticated attacker could leverage this vulnerability by sending specially crafted network traffic to an exposed IBM DataPower Gateway. Improper bounds checking within the gateway allows the attacker to overflow a buffer, potentially leading to the execution of arbitrary code on the system.

No authentication or user interaction needed.
Sending malformed network data.
Arbitrary code execution on the gateway.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated remote attacker to execute arbitrary code on the system when the DataPower Gateway is exposed to the internet. This could impact the confidentiality, integrity, and availability of the gateway and any services it manages.

System code execution on the gateway.
Exploits improper bounds checking.
Disrupts services, compromises data.

Operational Fix

Recommended remediation, mitigation, and detection steps

Teams responsible for securing the network edge and managing API gateways, such as infrastructure, platform, and security operations teams, should prioritize addressing this vulnerability in IBM DataPower Gateway. The first critical step is to identify all instances of the affected technology, assess their exposure and business criticality, and then confirm the accountable owner for remediation planning.

Own by infrastructure and platform teams.
Verify external accessibility and critical assets.
Plan remediation during scheduled maintenance.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is IBM DataPower Gateway?

IBM DataPower Gateway is an enterprise-grade appliance designed to function as an internet edge gateway, API manager, and integration hub. It is purpose-built to sit at the network boundary, where it inspects, secures, and routes high volumes of public-facing traffic for critical enterprise services.

What does a heap-based buffer overflow mean in CVE-2026-14269?

This vulnerability, classified as CWE-122, occurs because the software fails to properly check the size of data before writing it to a memory area called the heap. By sending more data than the allocated space can hold, an attacker can overwrite adjacent memory, potentially forcing the system to run unintended, malicious code.

How does an attacker trigger this vulnerability?

An unauthenticated attacker triggers this flaw by sending specially crafted network traffic to an affected gateway. Because the issue stems from improper bounds checking on incoming data, the vulnerability is triggered by the nature of the data packet itself; it does not require the attacker to have valid login credentials or rely on an existing user session.

Is my IBM DataPower Gateway at risk?

Halo Surface Signal indicates that IBM DataPower Gateways are quintessentially public-facing services because they are standardly deployed at the network edge to process incoming traffic. If your appliance is positioned to receive direct requests from the internet, it falls into the highest priority category for assessment.

What should I do if I run this software?

Begin by creating an inventory of all DataPower Gateway instances to determine which are active in your environment. Once identified, evaluate the business criticality of each instance and confirm who is responsible for managing these systems so that remediation planning can be prioritized during your next maintenance window.

References

www.ibm.com/support/pages/node/7289775

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.