CVE-2026-13683 in DiskStation Manager
Summary
by MITRE • 09/18/2026
An improper neutralization of special elements used in an SQL command ('SQL Injection') vulnerability in EventScheduler API in Synology DiskStation Manager (DSM) before 7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4 and 7.4-90075 allows remote authenticated users with administrator privileges to obtain non-sensitive information.
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Analysis
by VulDB Data Team • 09/18/2026
The vulnerability identified in Synology DiskStation Manager (DSM) versions prior to the specified patches represents a classic instance of SQL injection within the EventScheduler API component. This flaw stems from an improper neutralization of special elements used in SQL commands, specifically failing to adequately sanitize or validate user-supplied input before it is incorporated into database queries. While many SQL injection vulnerabilities allow for arbitrary code execution or complete data exfiltration, this particular instance is constrained by its authentication requirements and the nature of the information disclosed. The vulnerability requires remote authenticated access with administrator privileges, which significantly narrows the attack surface compared to unauthenticated variants but still poses a serious risk due to the high level of trust associated with administrative accounts in network-attached storage environments.
From a technical perspective, the EventScheduler API is responsible for managing scheduled tasks and events within the DSM operating system. When an administrator interacts with this interface, inputs are processed and translated into SQL statements that query or modify the underlying database storing schedule configurations. The flaw lies in the application logic where these inputs are not properly escaped or parameterized before execution. This allows a malicious actor who has obtained administrative credentials to inject custom SQL syntax into the request parameters. By carefully crafting input strings, an attacker can manipulate the structure of the executed query, potentially bypassing intended logical constraints and extracting data that was not originally intended for retrieval through standard API endpoints.
The operational impact of this vulnerability is primarily centered on information disclosure rather than system compromise or denial of service. The description explicitly states that it allows remote authenticated users to obtain non-sensitive information. This suggests that the injected SQL queries are likely configured in a way that returns data within existing application responses, such as error messages or standard API outputs, rather than allowing for blind extraction via time-based techniques or out-of-band channels. While the term "non-sensitive" is used, any unauthorized access to internal system data can be leveraged by an attacker with administrative privileges to map the environment further, identify other potential weaknesses, or gather context that aids in more sophisticated attacks against the NAS device and connected networks.
This vulnerability aligns closely with CWE-89: Improper Neutralization of Special Elements used in an SQL Command (SQL Injection). The core issue is a failure in input validation and sanitization processes within the web application layer. Furthermore, from a tactical perspective, this activity falls under MITRE ATT&CK technique T1059: Command and Scripting Interpreter if the injection leads to command execution, or more accurately T1213: Data from Information Repositories for data exfiltration via SQL queries. The requirement for administrative privileges places it within the context of privilege abuse, where a legitimate but compromised account is used to exploit internal application logic flaws that are not accessible to lower-privileged users.
Mitigation strategies must focus on both immediate patching and long-term architectural improvements. Synology has released updated versions of DSM (7.2.1-69057-12, 7.2.2-72806-9, 7.3.2-86009-4, and 7.4-90075) that address this flaw by implementing proper input validation and using parameterized queries or prepared statements within the EventScheduler API codebase. Administrators should prioritize applying these updates to all affected systems immediately. In addition to patching, organizations should enforce strict access controls for administrative accounts, ensuring that credentials are protected with multi-factor authentication where possible and that admin ports are not exposed directly to untrusted networks. Regular security audits of web application inputs and the implementation of Web Application Firewalls (WAFs) configured to detect SQL injection patterns can provide an additional layer of defense against such vulnerabilities in legacy or temporarily unpatched systems.