Remote Sunrise Helper for Windows 2026.14 - Unauthenticated File/Directory Listing

A public exploit has been published on Exploit-DB (EDB-52566) detailing an unauthenticated file/directory listing vulnerability in Remote Sunrise Helper for Windows 2026.14. The vulnerable software exposes an API endpoint /api/listFiles which can be accessed without authentication to list directory contents on the target Windows system. The exploit leverages HTTP GET requests to this endpoint, potentially allowing attackers to enumerate sensitive files and directories. The availability of this exploit increases the risk to systems running the affected version of Remote Sunrise Helper.

Attack Chain

1. Attacker identifies a target system running Remote Sunrise Helper for Windows 2026.14 on port 49762.
2. The attacker crafts an HTTP GET request to https://<target_ip>:49762/api/getVersion to determine if authentication is required.
3. If the response indicates that authentication is not required ( "requires.auth": False), the attacker proceeds to the next step.
4. The attacker crafts an HTTP GET request to https://<target_ip>:49762/api/listFiles with the X-HostName, X-ClientToken, and X-HostFullModel headers set to arbitrary values.
5. To list a specific directory, the attacker URL-encodes the path and includes it in the request to https://<target_ip>:49762/api/listFiles=<encoded_path>.
6. The server responds with a JSON payload containing a list of files and directories within the requested path.
7. The attacker parses the JSON response to enumerate files and directories on the target system.

Impact

Successful exploitation of this vulnerability allows an unauthenticated attacker to list files and directories on the Windows system running Remote Sunrise Helper 2026.14. This information can be used to discover sensitive information, identify potential targets for further exploitation, or gather intelligence about the system’s configuration. The impact is information disclosure, potentially leading to further compromise of the affected system.

Recommendation

• Apply appropriate access controls or remove the affected software.
• Monitor webserver logs for requests to the /api/listFiles endpoint from unusual source IPs, as detailed in the overview.
• Deploy the Sigma rule to detect unauthenticated access to the /api/listFiles endpoint as outlined below.