CVE-2026-35082 in Single-A
Summary
by MITRE • 06/03/2026
The ugw-logread method allows a remote attacker with user privileges to access arbitrary local files due to insufficient validation of user-supplied input.
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Analysis
by VulDB Data Team • 06/03/2026
The ugw-logread method represents a critical security vulnerability that enables remote attackers with user-level privileges to access arbitrary local files on a system through inadequate input validation mechanisms. This flaw exists within the log reading functionality of a network device or application, where user-supplied input is not properly sanitized or validated before being processed. The vulnerability stems from a failure to implement proper access controls and input filtering, allowing malicious users to manipulate the method's parameters to traverse file system paths and retrieve sensitive information from locations outside the intended scope. Such a flaw directly violates security principles of least privilege and input validation, creating an avenue for information disclosure attacks that can expose system logs, configuration files, or other sensitive data that should remain restricted to authorized personnel only.
The technical implementation of this vulnerability typically involves the method accepting file path parameters without proper sanitization, enabling path traversal attacks through crafted input sequences such as directory traversal strings or symbolic links. Attackers can exploit this weakness by submitting malicious input that bypasses normal file access restrictions, potentially allowing them to read system files, application logs, or configuration data that contains sensitive information such as passwords, encryption keys, or system credentials. This vulnerability is classified under CWE-22, which specifically addresses path traversal and directory traversal issues in software systems. The attack surface is particularly concerning because it requires only user privileges to exploit, meaning that even unauthenticated attackers who have gained basic access to the system can leverage this flaw to escalate their information gathering capabilities.
The operational impact of this vulnerability extends beyond simple information disclosure, as it can serve as a stepping stone for more sophisticated attacks within a network environment. An attacker who successfully exploits this vulnerability can gather intelligence about the system configuration, application behavior, and potentially identify other security weaknesses in the system. The exposure of log files may reveal authentication attempts, system errors, or other indicators of compromise that could be used to plan further attacks. Additionally, access to configuration files could expose sensitive settings or credentials that might be used to compromise other system components. From an adversarial perspective, this vulnerability aligns with tactics described in the attack pattern taxonomy under techniques such as credential access and discovery, where attackers seek to gather system information to facilitate lateral movement and persistence within compromised environments.
Mitigation strategies for this vulnerability must address the core issue of insufficient input validation through comprehensive security controls. The primary remediation involves implementing strict input validation and sanitization mechanisms that reject or filter out potentially dangerous characters and sequences that could enable path traversal attacks. Security measures should include the implementation of allowlists for valid file paths, proper access control enforcement, and the use of secure coding practices that prevent direct file system manipulation based on user input. Organizations should also consider implementing principle of least privilege controls, ensuring that the application running the ugw-logread method operates with minimal required permissions and cannot access files outside its designated scope. Regular security assessments and penetration testing should be conducted to identify similar vulnerabilities in other system components, while also implementing proper logging and monitoring to detect potential exploitation attempts. The vulnerability demonstrates the critical importance of validating all user-supplied input and implementing defense-in-depth strategies to protect against unauthorized access to sensitive system resources.