CVE-2026-17186 in Db2 Mirror for i
Summary
by MITRE • 08/14/2026
IBM Db2 Mirror for i 7.4, 7.5, and 7.6 could allow a remote attacker to execute arbitrary CL commands due to improper neutralization of special elements in a command.
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Analysis
by VulDB Data Team • 08/14/2026
This vulnerability affects IBM Db2 Mirror for i versions 7.4, 7.5, and 7.6, presenting a critical security risk that enables remote code execution through command injection attacks. The flaw stems from inadequate sanitization of special characters within command processing, allowing malicious actors to inject arbitrary CL commands into the system. When the application processes user-supplied input without proper validation or escaping mechanisms, it creates an avenue for attackers to bypass normal execution flows and directly manipulate the underlying operating system commands.
The technical implementation of this vulnerability resides in the command parsing and execution logic where special elements such as semicolons, pipes, or other command delimiters are not properly neutralized before being processed by the system. This represents a classic command injection vulnerability that falls under CWE-77, which specifically addresses improper neutralization of special elements used in commands. Attackers can exploit this weakness by crafting malicious input that includes CL command syntax, potentially gaining unauthorized access to system resources, executing arbitrary code with elevated privileges, or disrupting normal operations through destructive command execution.
From an operational perspective, this vulnerability poses significant risks to organizations relying on IBM Db2 Mirror for i systems, as remote exploitation could lead to complete system compromise. The attack surface extends beyond simple data manipulation to include full system control, potentially allowing threat actors to establish persistent access, exfiltrate sensitive information, or deploy additional malicious payloads. The impact is particularly severe given that the vulnerability affects multiple versions of the software, suggesting a widespread exposure across various organizational environments.
Organizations should implement immediate mitigations including applying the latest security patches provided by IBM, implementing network segmentation to limit access to affected systems, and deploying intrusion detection systems to monitor for suspicious command execution patterns. Additionally, input validation controls should be strengthened at all application interfaces to prevent unauthorized command injection attempts. According to ATT&CK framework, this vulnerability maps to T1059.001 (Command and Scripting Interpreter: PowerShell) and T1203 (Exploitation for Client Execution), with potential lateral movement capabilities once initial compromise occurs. System administrators should also consider implementing application whitelisting policies and monitoring for unusual command execution patterns that could indicate exploitation attempts.