Vulnerability Description
A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP port 53413. Exact version boundaries remain undocumented. An unauthenticated remote attacker can send specially crafted UDP packets to execute arbitrary commands on the affected device. This backdoor uses a hardcoded authentication mechanism and accepts shell commands post-authentication. Some device models include a non-standard implementation of the `echo` command, which may affect exploitability.
Related Weaknesses (CWE)
References
- https://raw.githubusercontent.com/rapid7/metasploit-framework/master/modules/exp
- https://vulners.com/metasploit/MSF:EXPLOIT-LINUX-MISC-NETCORE_UDP_53413_BACKDOOR
- https://web.archive.org/web/20140828114943/http://blog.trendmicro.com/trendlabs-
- https://www.exploit-db.com/exploits/43387
- https://www.seebug.org/vuldb/ssvid-90227
- https://www.shadowserver.org/what-we-do/network-reporting/netcore-netis-router-v
- https://www.vulncheck.com/advisories/netcore-netis-routers-backdoor-rce
FAQ
What is CVE-2025-34117?
CVE-2025-34117 is a documented vulnerability. A remote code execution vulnerability exists in multiple Netcore and Netis routers models with firmware released prior to August 2014 due to the presence of an undocumented backdoor listener on UDP po...
How severe is CVE-2025-34117?
CVSS scoring is not yet available for CVE-2025-34117. Check NVD for updates.
Is there a patch for CVE-2025-34117?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.