CVE-2026-104806 in MiVoice Office 400
Summary
by MITRE • 10/05/2026
DigitalCanion has discovered a path traversal vulnerability that allows an attacker to access files outside of the intended directory.
The specific flaw exists within the Maintenance → System Logs functionality of the web management portal listening on TCP port 443. The application fails to properly validate user-supplied file paths, allowing an attacker to manipulate the requested path and traverse the underlying directory structure.
By exploiting this vulnerability, an attacker can access and download files located outside the intended system logs directory, including potentially sensitive system and application files.
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Analysis
by VulDB Data Team • 10/05/2026
The identified security flaw represents a classic Path Traversal vulnerability within the DigitalCanion web management portal, specifically affecting the System Logs functionality accessible via TCP port 443. This issue stems from an insufficient validation of user-supplied input when constructing file paths for log retrieval operations. In secure software design, applications must strictly enforce that any requested resource remains confined to a designated directory structure. However, in this instance, the application fails to sanitize or canonicalize the path provided by the attacker, allowing special characters such as dot-dot-slash sequences to manipulate the underlying operating system's file resolution logic. This lack of input validation enables an adversary to break out of the intended logs directory and navigate up the hierarchical tree structure to access arbitrary files on the host system.
From a technical perspective, this vulnerability aligns with CWE-22: Improper Limitation of a Pathname to a Restricted Directory. The core deficiency lies in the application's failure to normalize or validate the file path before processing it. When an attacker supplies a maliciously crafted filename containing directory traversal sequences, the server interprets these as legitimate navigation commands rather than literal characters. Consequently, instead of returning content from the restricted log folder, the web service reads and returns data from sensitive locations elsewhere on the filesystem. This behavior is particularly dangerous in management interfaces because they often run with elevated privileges or have access to configuration files that contain credentials, private keys, or internal network topology details.
The operational impact of this vulnerability is severe due to the nature of the affected component. System logs and associated administrative configurations are critical for both security monitoring and system stability. An attacker exploiting this flaw can download sensitive system files, potentially exposing database connection strings, API secrets, SSH keys, or other authentication credentials stored in configuration directories adjacent to the log folder. This information disclosure facilitates further attacks such as credential stuffing, lateral movement within the network, or complete compromise of the managed device. Furthermore, because the vulnerability exists in a service listening on port 443, it is exposed over HTTPS and potentially accessible from external networks if not properly segmented by firewalls, significantly increasing the attack surface.
This exploitation technique corresponds to several tactics in the MITRE ATT&CK framework, primarily Information Gathering under Tactic TA0043. Specifically, it relates to techniques such as OS Credential Dumping or File Discovery where an adversary seeks to locate and exfiltrate sensitive data from local systems. The ability to read arbitrary files allows for reconnaissance that can lead to privilege escalation if combined with other vulnerabilities in the management portal. It also falls under the broader category of Unrestricted Upload of File with Dangerous Type if the traversal is used to overwrite or replace critical system binaries, although the current description emphasizes reading and downloading existing sensitive files.
To mitigate this vulnerability, immediate remediation should focus on implementing strict input validation for all file path parameters within the System Logs module. The application must enforce a whitelist approach where only specific log filenames are permitted, rather than allowing arbitrary string inputs. Additionally, developers should utilize canonicalization functions to resolve any symbolic links or relative paths before processing them, ensuring that the final resolved path remains strictly within the intended directory boundary. Implementing chroot jails or containerized environments for the web service can also limit the blast radius by restricting filesystem access at the operating system level. Regular security audits and static code analysis tools should be employed to detect similar input handling flaws across other modules of the DigitalCanion platform, ensuring that all user-controlled data is treated as untrusted until explicitly validated against strict constraints.