CVE-2026-14275 in i Access Family
Summary
by MITRE • 09/15/2026
IBM i Access Family 1.1.2.0 through 1.1.9.15 IBM i Access Client Solutions could allow an authenticated user to execute arbitrary commands with normal user privileges on the system due to improper validation of user supplied input in a STRPCCMD CL command.
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Analysis
by VulDB Data Team • 09/15/2026
The vulnerability identified within IBM i Access Family versions 1.1.2.0 through 1.1.9.15, specifically affecting the IBM i Access Client Solutions component, represents a significant security risk related to improper input validation in system command execution interfaces. This flaw centers on the STRPCCMD CL command, which is designed to allow users to start Program Command Control commands from within an IBM i environment. The core technical deficiency lies in the application's failure to adequately sanitize or validate user-supplied input before passing it to the underlying operating system for execution. When a user provides input that contains maliciously crafted characters or sequences intended to break out of the expected command context, the software fails to recognize these as potentially dangerous payloads. Consequently, this lack of rigorous validation allows an authenticated attacker to inject arbitrary commands into the execution stream. Because the vulnerability exploits existing authentication mechanisms, it requires the adversary to first gain valid access credentials to the system, but once achieved, it facilitates a direct path for command injection that bypasses expected security controls within the application layer.
From a technical perspective, this issue is classified under CWE-78, which denotes Improper Neutralization of Special Elements used in an OS Command, commonly known as OS Command Injection. The vulnerability arises because the STRPCCMD function does not sufficiently escape or filter special characters such as semicolons, pipes, ampersands, or backticks that are interpreted by the shell environment. An attacker can leverage these metacharacters to chain additional commands after the intended command string, effectively executing arbitrary code with the privileges of the authenticated user account. This behavior aligns with MITRE ATT&CK technique T1059, Command and Scripting Interpreter, specifically sub-techniques involving local shell execution. The exploitation does not require privilege escalation in terms of moving from a low-level service account to an administrator account immediately; rather, it allows the attacker to operate within the context of their current user profile, which can still be devastating depending on the permissions assigned to that specific role.
The operational impact of this vulnerability is substantial for organizations relying on IBM i Access Client Solutions for remote management and data integration tasks. An authenticated malicious actor or a compromised legitimate account holder could use this flaw to execute system commands that read sensitive configuration files, exfiltrate database contents, modify application settings, or install additional malware components such as backdoors or cryptominers. Since the execution occurs with normal user privileges, the immediate damage is constrained by those permissions; however, in many enterprise environments, standard users possess significant access rights to internal resources and databases. Furthermore, this command injection capability can serve as a foothold for further lateral movement within the network if the compromised system has connectivity to other critical infrastructure components. The ability to execute arbitrary commands also enables attackers to disable logging mechanisms or security tools running under that user context, thereby obscuring their activities from intrusion detection systems and forensic analysts.
Mitigation strategies must focus on both immediate remediation and long-term architectural improvements. IBM has released updated versions of the Access Client Solutions software beyond version 1.1.9.15 which address this input validation flaw by implementing stricter sanitization routines for inputs passed to the STRPCCMD command. Organizations should prioritize upgrading their client installations to these patched versions as soon as possible. In addition to patching, it is advisable to enforce the principle of least privilege across all user accounts that utilize IBM i Access Client Solutions. By restricting the permissions of standard users so they cannot execute system-level commands or access sensitive files, the blast radius of a successful exploitation attempt is significantly reduced. Security teams should also implement network segmentation to limit communication between client workstations and IBM i servers, ensuring that even if an endpoint is compromised, the attacker has limited pathways to reach critical systems. Regular auditing of user activity logs for unusual command execution patterns can help in early detection of potential abuse attempts targeting this vulnerability.