Attack Chain

1. The attacker identifies a vulnerable Synology C2 Identity Edge Server running a DSM version prior to 1.76.0-0307.
2. The attacker sends a crafted request to the edge server, targeting the exposed dangerous method or function.
3. The vulnerable function processes the request without proper authorization or input validation.
4. The server exposes sensitive user credentials in its response.
5. The attacker captures the exposed user credentials from the server’s response.
6. The attacker uses the obtained credentials to authenticate to other services or systems accessible via the exposed credentials.

Impact

Successful exploitation of CVE-2025-14713 allows remote attackers to obtain user credentials from the Synology C2 Identity Edge Server. This could lead to unauthorized access to sensitive data, lateral movement within the network, and potential compromise of the entire system. The impact is significant as it directly leads to credential exposure.

Recommendation

• Upgrade Synology C2 Identity Edge Server package to version 1.76.0-0307 or later to patch CVE-2025-14713.
• Monitor network traffic for suspicious requests targeting the Synology C2 Identity Edge Server using the Sigma rule provided to detect potential exploitation attempts.