CVE-2026-27551 in ICE2-8IOL1-G65L-V1D
Summary
by MITRE • 09/16/2026
A low-privileged remote attacker can exploit a command injection vulnerability in the /index.php/ajax/parameterManage endpoint using user credentials allowing execution of commands with root privileges on the device.
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Analysis
by VulDB Data Team • 09/16/2026
The identified security flaw represents a critical severity issue within the web application interface, specifically targeting the parameter management functionality accessible via the index.php ajax endpoint. This vulnerability stems from improper input validation and sanitization mechanisms when processing data submitted through this specific API route. The core technical deficiency lies in the failure to adequately escape or filter special characters that are interpreted by the underlying operating system command interpreter. When a user submits crafted input containing shell metacharacters, such as semicolons, pipes, or backticks, these inputs are concatenated directly into system commands without sufficient restriction. This allows an attacker to inject arbitrary operating system commands that execute within the context of the web server process.
A defining characteristic of this vulnerability is its potential for privilege escalation despite requiring only low-privileged credentials for initial access. Typically, command injection vulnerabilities may be limited by the permissions of the service account running the application. However, in this specific implementation, the backend processes handling parameter management appear to execute commands with elevated privileges, likely root or equivalent administrative rights on the target device. This discrepancy between user authentication level and execution privilege creates a severe security gap. An attacker who successfully authenticates as a standard user can leverage this flaw to bypass access controls entirely, effectively gaining full control over the underlying operating system rather than just the application layer.
The operational impact of exploiting this vulnerability is profound and potentially catastrophic for device integrity and confidentiality. Once command execution with root privileges is achieved, an adversary can perform a wide range of malicious actions including installing persistent backdoors, exfiltrating sensitive data stored on the device, modifying critical configuration files to disable security logging or monitoring, and pivoting to other systems within the network segment. The ability to execute commands as root means that standard containment strategies such as isolating the web service may be insufficient if the attacker can modify system-level configurations or kernel parameters. This level of access compromises the entire trust boundary of the device, turning a simple user account into a gateway for complete system compromise.
From an industry standards perspective, this vulnerability aligns with CWE-78 Improper Neutralization of Special Elements used in an OS Command commonly known as OS Command Injection. The specific mechanism where low-privileged users gain high-level access also relates to CWE-269 Improvement Control which addresses improper privilege management. In terms of the MITRE ATT&CK framework, this exploitation path maps directly to T1059 Command and Scripting Interpreter for initial execution and potentially T1078 Valid Accounts if the attacker uses stolen or default credentials. The escalation from low privileges to root access may also involve techniques associated with privilege escalation vectors depending on how the elevated permissions are granted within the application architecture.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary technical fix involves implementing strict input validation and output encoding for all parameters passed through the ajax/parameterManage endpoint. Developers should employ allow-listing approaches where only expected character sets or formats are accepted, rejecting any input containing shell metacharacters by default rather than attempting to filter them out which can be error-prone. Additionally, replacing direct system command execution with safer API calls or library functions that do not invoke the operating system shell is recommended. If shell invocation is unavoidable, arguments should be passed as distinct array elements to prevent concatenation issues.
Beyond code-level fixes, operational mitigations are essential to reduce risk exposure. Principle of least privilege must be enforced by ensuring the web application process runs with minimal necessary permissions, avoiding root or administrative accounts entirely for routine operations. Network segmentation can also help contain potential damage by restricting lateral movement if an attacker gains initial foothold through this vector. Regular security audits and static code analysis tools configured to detect command injection patterns should be integrated into the development lifecycle to prevent similar flaws from being introduced in future updates. Monitoring logs for unusual command execution patterns or unexpected privilege changes can aid in early detection of exploitation attempts before significant damage occurs.