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The vulnerability CVE-2025-29846 targets the portenable cgi component in Synology software, likely within DiskStation Manager (DSM). This CGI script is accessible via web interfaces on Synology devices, often used for service management. Remote authenticated users can exploit it by sending crafted HTTP requests to the cgi endpoint. Specifically, when certain parameters are included in the request, the script improperly returns data about installed packages. This occurs due to insufficient access controls and input validation in the cgi code. The attack requires valid user credentials, but even low-privilege accounts may perform the exploit. By manipulating query strings or POST data, attackers trigger responses that leak package status information. The disclosed data includes package names, versions, and installation states. This information disclosure aids reconnaissance for further attacks. The vulnerability stems from the cgi script not restricting package status queries to authorized functions. Exploits involve simple web requests, such as GET or POST methods with specific actions. The flaw is present in multiple Synology versions prior to patches. It highlights common web application security issues like improper authorization. Security researchers identified the bug through code analysis or testing. Synology addressed it by updating the cgi component to validate user permissions. Unpatched systems remain vulnerable to authenticated information leaks. The impact is limited to data exposure but can facilitate targeted attacks. Mitigations include updating software and restricting network access. This CVE underscores the need for secure coding practices in embedded systems.
Platform: Synology
Version: Multiple versions
Vulnerability: Information Disclosure
Severity: Medium
Date: 12/04/2025
Prediction: Patch December 2025
What Undercode Say:
Analytics:
curl -k -u "user:pass" "https://target/cgi-bin/portenable.cgi?action=status"
nmap -p 443 --script http-synology-cve-2025-29846 target
How Exploit:
Authenticated request to portenable.cgi.
Craft parameter to leak packages.
Use credentials for access.
Protection from this CVE:
Update Synology DSM.
Restrict user privileges.
Monitor cgi accesses.
Impact:
Package status disclosure.
Reconnaissance facilitation.
Low integrity impact.
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Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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