CVE-2026-34015 in Video Station
Summary
by MITRE • 10/15/2026
A path traversal vulnerability has been reported to affect Video Station. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data.
We have already fixed the vulnerability in the following version: Video Station 5.8.8 and later
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Analysis
by VulDB Data Team • 10/15/2026
The identified security flaw within Synology's Video Station application represents a classic path traversal vulnerability, technically classified under CWE-22 as Improper Limitation of a Pathname to a Restricted Directory. This type of weakness occurs when an application fails to properly validate or sanitize user-supplied input that is used to construct file system paths. In the context of Video Station, which serves media content from various directories on the NAS device, this vulnerability allows for unauthorized access to files outside the intended scope. The core technical issue lies in the insufficient handling of directory traversal sequences, such as dot-dot-slash characters or encoded variations thereof, within request parameters that dictate file retrieval operations. When these inputs are processed without rigorous normalization and boundary checks, the underlying operating system interprets them literally, leading the application to read files from arbitrary locations on the server's storage rather than restricting access strictly to the designated media libraries.
The operational impact of this vulnerability is significant for any deployment where remote attackers have obtained valid user credentials through other means, such as credential stuffing, phishing, or weak password exploitation. Once an attacker authenticates with a legitimate account, they can leverage this path traversal flaw to exfiltrate sensitive system data that should remain inaccessible via the application interface. This includes configuration files, database dumps containing hashed passwords for other users, private documents stored on the NAS, and potentially kernel-level logs or scripts. The ability to read unexpected files effectively bypasses the intended access control mechanisms of the Video Station service, turning a media management tool into an information disclosure vector that can facilitate further lateral movement within the network environment.
From a threat intelligence perspective, this vulnerability aligns with MITRE ATT&CK technique T1083, which covers File and Directory Discovery, specifically when used in conjunction with data exfiltration techniques like T1567 or T1041 depending on how the stolen data is transmitted out of the network. The exploitation chain typically involves an authenticated user crafting a malicious HTTP request that includes path traversal sequences to reference files located outside the web root or media directories. Because Video Station operates with specific privileges related to file access, successful exploitation allows the attacker to view the contents of these restricted resources directly in their browser response or through automated scraping tools. This compromises the confidentiality integrity pillar of information security for all data stored on the NAS device that is reachable via the compromised account's permissions.
Mitigation strategies must prioritize immediate patching as outlined by the vendor, specifically upgrading Video Station to version 5.8.8 or later where this flaw has been resolved through improved input validation and path canonicalization checks. In environments where immediate patching is not feasible due to operational constraints, administrators should implement network-level controls such as web application firewalls configured to detect and block common path traversal patterns in HTTP requests targeting the Video Station service. Additionally, enforcing strict least-privilege principles for user accounts associated with media services can limit the blast radius if an account is compromised. Regular audits of file permissions on the NAS ensure that even if a traversal occurs, the underlying operating system denies access to highly sensitive files based on POSIX or Windows ACLs rather than relying solely on application-level security controls.