CVE-2024-50630 Overview
CVE-2024-50630 is a missing authentication for critical function vulnerability [CWE-306] affecting the webapi component of Synology Drive Server. Remote attackers can obtain administrator credentials without authentication over the network. The flaw carries a CVSS 3.1 base score of 7.5 and is exploitable without user interaction or prior privileges. Synology has released fixed versions and documented the issue in Synology Security Advisory SA-24-21. The EPSS score of 22.7% places this vulnerability in the 97th percentile of exploitation likelihood, indicating meaningful attacker interest despite no public proof-of-concept.
Critical Impact
Unauthenticated remote attackers can retrieve administrator credentials from vulnerable Synology Drive Server deployments, enabling full administrative takeover of the file collaboration service.
Affected Products
- Synology Drive Server versions prior to 3.0.4-12699
- Synology Drive Server versions prior to 3.2.1-23280
- Synology Drive Server versions prior to 3.5.0-26085 and 3.5.1-26102
Discovery Timeline
- 2025-03-19 - CVE-2024-50630 published to the National Vulnerability Database
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2024-50630
Vulnerability Analysis
The vulnerability resides in the webapi component of Synology Drive Server, the file synchronization and collaboration platform that runs on Synology DiskStation Manager (DSM). The webapi endpoint exposes functionality that should be restricted to authenticated administrators. Because the endpoint fails to enforce authentication on a critical function, remote clients can invoke it directly and retrieve administrator credential material. Successful exploitation grants attackers the credentials required to authenticate as an administrator against the Drive Server, and potentially against connected DSM services that share credential trust boundaries.
Root Cause
The root cause is classified as CWE-306: Missing Authentication for Critical Function. A privileged API path within the webapi component does not validate a caller session, token, or credential before returning sensitive data. This design gap allows anonymous network callers to reach a code path that assumes prior authentication.
Attack Vector
Exploitation occurs over the network against the HTTP/HTTPS interface exposing Synology Drive Server. Attack complexity is low, no privileges are required, and no user interaction is needed. Synology's advisory describes the exploitation vectors as unspecified, and no public proof-of-concept has been released at the time of writing. Internet-exposed Synology NAS devices running vulnerable Drive Server builds are the primary targets.
No verified exploit code is currently available. Refer to the Synology Security Advisory SA-24-21 for vendor technical details.
Detection Methods for CVE-2024-50630
Indicators of Compromise
- Unauthenticated HTTP requests to Synology Drive Server webapi endpoints originating from external or unexpected internal addresses.
- Successful administrator logins to DSM or Drive Server from IPs with no prior authentication history.
- Unexpected creation, modification, or export of Drive Server shares, teams, or sync tasks by administrator accounts.
Detection Strategies
- Inventory all Synology NAS appliances and confirm the installed Drive Server package version against the fixed builds listed in SA-24-21.
- Review reverse proxy, firewall, and DSM access logs for anonymous webapi calls, particularly to endpoints returning credential or configuration data.
- Correlate administrator authentication events with source IP reputation and geolocation to surface anomalous logins.
Monitoring Recommendations
- Enable DSM notification and log forwarding to a central SIEM for continuous monitoring of Drive Server administrative activity.
- Alert on Drive Server package version regressions and on new administrator account creations.
- Monitor egress from the NAS for outbound connections that could indicate credential exfiltration or attacker command-and-control.
How to Mitigate CVE-2024-50630
Immediate Actions Required
- Upgrade Synology Drive Server to 3.0.4-12699, 3.2.1-23280, 3.5.0-26085, 3.5.1-26102, or later, matching the DSM major version in use.
- Remove direct internet exposure of DSM and Drive Server web interfaces where not strictly required.
- Rotate administrator credentials and any API tokens after patching, assuming possible prior exposure.
Patch Information
Synology has released fixed Drive Server packages addressing CVE-2024-50630. Administrators should apply the update through DSM Package Center or download the corresponding package directly from Synology. Full remediation details are documented in the Synology Security Advisory SA-24-21.
Workarounds
- Restrict access to Drive Server webapi endpoints using DSM firewall rules and allowlisted source networks until patching is complete.
- Place Drive Server behind a VPN or authenticated reverse proxy to require an additional authentication layer.
- Disable Drive Server on appliances that do not actively use file collaboration features.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
