Description

IBM i Access Client Solutions 1.1.2.0 through 1.1.9.13 could allow a local attacker to execute arbitrary code due to improper neutralization of special elements used in an OS command.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-12T21:17:36.427Z",
  "pubdate": "2026-08-12T21:17:36.427Z",
  "executiveSummary": "This vulnerability is an OS command injection flaw affecting IBM i Access Client Solutions. It allows a local attacker to execute arbitrary system commands with the privileges of the application context. The vulnerability impacts IBM i Access Client Solutions versions 1.1.2.0 through 1.1.9.13. The risk implications include complete local system compromise, unauthorized execution of administrative operations, and potential escalation of privileges depending on the execution context of the vulnerable software. Successful exploitation requires local access to the target system and the ability to interact with the vulnerable component by supplying maliciously crafted input designed to break out of command strings and execute arbitrary operating system instructions. The root cause stems from improper neutralization of special elements used within OS commands, failing to adequately sanitize inputs passed to underlying system shells.",
  "technicalDetails": "The vulnerability resides in IBM i Access Client Solutions versions 1.1.2.0 through 1.1.9.13, specifically within the input handling mechanisms that construct and execute operating system commands. The root cause is the improper neutralization of special characters and metacharacters used in OS command strings. When user-supplied or environment-derived input is passed directly to a system shell or execution function without proper sanitization, validation, or parameterization, an attacker can append command separators or injection syntax.\nExploitation occurs locally. An attacker with local access to the host running the vulnerable application crafts a specialized payload containing command injection sequences. By interacting with the vulnerable component of IBM i Access Client Solutions, the attacker supplies this input, causing the application to execute the unintended injected instructions alongside or instead of the original intended command.\nThe attack flow proceeds as follows: First, the attacker identifies an input vector within IBM i Access Client Solutions that interfaces with the underlying operating system command interpreter. Second, the attacker formulates an exploit payload utilizing command chaining operators or shell metacharacters. Third, the payload is delivered to the vulnerable component via local interaction. Fourth, the application processes the input without adequate escaping, concatenating the malicious payload into the command string. Fifth, the operating system executes the resulting composite command string, granting the attacker arbitrary code execution capabilities within the security context of the application process."
}