CVE-2026-35077 in Single-A
Summary
by MITRE • 06/03/2026
The ugw-delete-file method allows a remote attacker with user privileges to delete arbitrary local files due to insufficient validation of user-controlled input.
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Analysis
by VulDB Data Team • 06/03/2026
The ugw-delete-file method represents a critical directory traversal vulnerability that enables remote attackers with minimal privileges to execute arbitrary file deletion operations on affected systems. This flaw stems from inadequate input validation mechanisms that fail to properly sanitize user-controlled parameters before processing file operations. The vulnerability exists within the user gateway component where file deletion functionality is exposed to remote access without proper authorization checks or input sanitization measures. Attackers can exploit this weakness by crafting malicious requests that manipulate file paths and trigger unintended file removal operations, potentially leading to system compromise or data loss.
The technical implementation of this vulnerability falls under the category of improper input validation as defined by CWE-20, which specifically addresses weaknesses related to insufficient validation of input parameters. The flaw operates by accepting user-supplied data directly into file system operations without proper filtering or sanitization, creating an environment where attackers can manipulate the intended file paths. This type of vulnerability is particularly dangerous because it allows attackers to navigate beyond intended file boundaries and delete files that should remain protected. The security implications extend beyond simple file deletion to include potential privilege escalation scenarios where attackers might target system-critical files or configuration data.
From an operational impact perspective, this vulnerability creates significant risks for system integrity and availability. Remote attackers can leverage this weakness to delete critical system files, configuration data, or user information, potentially causing system instability or complete service disruption. The attack surface is particularly concerning because it requires only user-level privileges to execute, meaning that even unauthenticated attackers could potentially exploit this vulnerability. The implications for enterprise environments are severe as this type of vulnerability can be used to disrupt operations, compromise data integrity, or serve as a foothold for more extensive attacks within the network infrastructure.
Mitigation strategies should focus on implementing robust input validation mechanisms and enforcing proper access controls for file system operations. The most effective approach involves implementing strict parameter validation that filters out potentially dangerous characters or sequences that could be used for path manipulation. Organizations should also implement the principle of least privilege by ensuring that file operations are restricted to authorized users and processes only. Additionally, implementing proper logging and monitoring of file operations can help detect suspicious activities that may indicate exploitation attempts. Security controls should include input sanitization, output encoding, and proper error handling to prevent attackers from gaining additional information about the system through error messages. This vulnerability aligns with several ATT&CK techniques including T1059 for command and scripting interpreter and T1486 for data destruction, making it a significant concern for defensive security teams implementing comprehensive threat detection capabilities.