CVE-2026-13094 in i Access Client Solutions
Summary
by MITRE • 08/12/2026
IBM i Access Client Solutions 1.1.2.0 through 1.1.9.13 is vulnerable to arbitrary code execution on Windows when installed for all users due to publicly writeable configuration file.
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Analysis
by VulDB Data Team • 08/12/2026
The vulnerability in IBM i Access Client Solutions affects versions 1.1.2.0 through 1.1.9.13 on Windows systems where the software is installed for all users. This represents a critical security flaw that stems from improper file permissions and privilege escalation mechanisms within the installation process. The core issue manifests when configuration files are created with world-writable permissions, allowing any local user to modify critical system components.
This vulnerability falls under CWE-732 which specifically addresses incorrect permissions for critical resources, and aligns with ATT&CK technique T1068 which covers local privilege escalation through abuse of system permissions. The flaw enables an attacker to inject malicious code into the configuration files that are subsequently executed with elevated privileges during normal operation. When installed system-wide, the application creates configuration files in locations accessible to all users, creating a persistent attack surface that can be exploited by any user with local access.
The operational impact of this vulnerability is severe as it allows for arbitrary code execution at the system level without requiring administrative credentials. An attacker can modify configuration files to redirect network traffic, install backdoors, or execute malicious payloads that persist across system reboots. The attack vector is particularly concerning because it requires no special privileges beyond local login access, making it exploitable in environments where users have legitimate access to workstations but should not possess administrative capabilities.
Mitigation strategies should focus on immediate permission adjustments for affected configuration files and implementation of proper privilege separation during installation processes. Organizations should verify that configuration files are created with restrictive permissions and that the installation process properly implements least privilege principles. Additionally, regular security audits should monitor for publicly writeable files in critical system directories, and the software should be updated to versions that address this specific permission flaw. System administrators should also consider implementing application whitelisting policies and monitoring for unauthorized modifications to critical configuration files as part of their overall defense-in-depth strategy.