CVE-2026-16170 in DataPower Gateway
Summary
by MITRE • 10/08/2026
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, 11.0.0.0 through 11.0.0.2 could allow a remote attacker to cause a denial of service due to a heap buffer overflow.
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Analysis
by VulDB Data Team • 10/08/2026
The vulnerability identified in IBM DataPower Gateway versions ranging from 10.5.0.0 through 10.5.0.22, as well as the 10.6.x and 11.0.0 series up to their respective patch levels, represents a critical security flaw rooted in improper memory management within the application's core processing logic. This specific issue is classified under CWE-122, which denotes a heap-based buffer overflow. In this context, the vulnerability arises when the gateway processes specially crafted network traffic or malformed input data that exceeds the expected boundaries of allocated memory buffers on the heap. The DataPower Gateway serves as a high-performance integration platform for API management and security, handling vast amounts of XML, JSON, and other structured data formats. When an attacker sends requests containing oversized payloads or specifically engineered sequences designed to exploit parsing inconsistencies, the application fails to perform adequate bounds checking before writing data into memory structures. This lack of validation allows external input to overwrite adjacent memory locations on the heap, corrupting internal data structures that manage connection states, session information, and processing queues.
The operational impact of this vulnerability is primarily characterized by a denial of service condition rather than arbitrary code execution or privilege escalation in its immediate manifestation. Because the corruption occurs within the heap, it typically leads to instability in the application's runtime environment. The most common result is the abrupt termination of the DataPower Gateway process due to segmentation faults triggered by the memory manager detecting invalid pointer references or corrupted metadata. For an organization relying on this gateway for critical API traffic routing and security enforcement, such a crash results in immediate service interruption. This disruption can halt all inbound and outbound communications processed through the appliance, effectively creating a single point of failure that impacts downstream services dependent on the gateway's availability. While heap overflows can sometimes be leveraged to execute arbitrary code by manipulating function pointers or return addresses, the specific description emphasizes denial of service, suggesting that exploitation for remote code execution may require additional conditions or is not reliably achievable with current public knowledge. However, the potential for instability remains high, and any memory corruption in a security appliance poses significant risks beyond simple availability loss.
From an attacker's perspective, this vulnerability aligns with ATT&CK technique T1498, Network Denial of Service, specifically within the context of exploiting application layer protocols to disrupt service continuity. The attack vector is remote, meaning that no authentication or physical access is required to trigger the condition if the gateway is exposed to untrusted networks without sufficient upstream filtering. This makes it particularly dangerous for public-facing API endpoints where automated scanners or malicious actors can probe for vulnerabilities by sending malformed requests at scale. The ability to cause a crash remotely allows adversaries to conduct persistent availability attacks, potentially masking other malicious activities during periods of system instability or simply causing business disruption through resource exhaustion and service downtime.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. The primary defense is the application of vendor-provided patches that address the buffer overflow by implementing strict input validation and bounds checking within the parsing routines responsible for handling incoming data streams. Organizations running affected versions should prioritize upgrading to a patched release immediately, ensuring that all components including firmware and software bundles are updated consistently across the deployment environment. In addition to patching, network-level controls such as Web Application Firewalls (WAF) can be configured to inspect inbound traffic for anomalies indicative of buffer overflow attempts, such as unusually large payload sizes or malformed XML/JSON structures. Rate limiting and connection throttling should also be enforced to mitigate the impact if an attacker attempts a volumetric denial-of-service attack leveraging this flaw. Regular vulnerability scanning and penetration testing focused on API gateways are essential to identify similar misconfigurations or unpatched weaknesses before they can be exploited in production environments.