CVE-2026-9587 in Switchvox SMB Edition
Summary
by MITRE • 07/17/2026
An authenticated local file inclusion vulnerability exists in Sangoma Switchvox SMB Edition 8.3 (104997). The play_file functionality accepts user-controlled input through the sound_path parameter and fails to properly validate file paths before accessing the underlying filesystem. By supplying absolute paths, an authenticated attacker can retrieve files outside the intended directory scope.
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Analysis
by VulDB Data Team • 07/17/2026
The vulnerability under examination represents a critical authenticated local file inclusion flaw within Sangoma Switchvox SMB Edition version 8.3 build 104997, classified as a weakness in input validation and access control mechanisms. This issue stems from insufficient sanitization of user-supplied parameters within the play_file functionality, specifically targeting the sound_path parameter that accepts arbitrary file path inputs without proper validation. The flaw allows authenticated attackers to manipulate the application's file access behavior by providing absolute paths, thereby bypassing intended directory restrictions and gaining unauthorized access to sensitive system files outside the designated scope.
The technical implementation of this vulnerability demonstrates a classic path traversal attack vector where the application fails to properly sanitize or validate input parameters before using them in filesystem operations. When an authenticated user submits a crafted sound_path parameter containing absolute file paths, the application processes these inputs without adequate checks, leading to unintended file system access. This weakness directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal vulnerabilities. The vulnerability exists due to inadequate input filtering and the absence of proper access control mechanisms that should restrict file access to predefined directories.
The operational impact of this vulnerability extends beyond simple information disclosure, as authenticated attackers can potentially access sensitive system files including configuration data, user credentials, application logs, and other confidential information stored outside the intended application scope. Attackers could leverage this flaw to escalate privileges by accessing system configuration files or to extract valuable intelligence that might aid in further exploitation attempts. The authenticated nature of this vulnerability means that attackers must first obtain valid credentials, but once achieved, they can perform arbitrary file reads without additional authorization requirements, making this particularly dangerous in environments where administrative access is compromised.
Mitigation strategies for this vulnerability should focus on implementing comprehensive input validation and access control measures within the application's file handling mechanisms. The most effective approach involves proper parameter sanitization through whitelisting of allowed file paths, absolute path normalization, and strict directory traversal prevention techniques. Organizations should implement mandatory access controls that restrict file operations to predefined directories and employ secure coding practices that validate all user inputs before processing. Additionally, regular security assessments and code reviews should be conducted to identify similar patterns in other application components. This vulnerability aligns with several ATT&CK techniques including T1059 for command and scripting interpreter and T1566 for credential access, emphasizing the need for comprehensive defensive measures across multiple attack vectors. System administrators should also consider implementing network segmentation and monitoring solutions that can detect anomalous file access patterns indicative of exploitation attempts.