Remote Code Execution Vulnerability in Netcore and Netis Routers
CVE-2025-34117

9.3CRITICAL

Key Information:

Vendor

Netcore Technology

Status
Router Firmware
Vendor
CVE Published:
16 July 2025

Badges

👾 Exploit Exists🟡 Public PoC🟣 EPSS 50%

What is CVE-2025-34117?

A remote code execution vulnerability affects various models of Netcore and Netis routers with firmware released before August 2014. This issue arises from an undocumented backdoor listener operating on UDP port 53413, allowing unauthenticated remote attackers to send specially crafted UDP packets that can execute arbitrary commands on the impacted devices. The backdoor uses hardcoded authentication, allowing post-authentication shell commands to be executed. Certain models exhibit a unique implementation of the 'echo' command, which may influence how the vulnerability can be exploited.

Affected Version(s)

Router firmware Prior to August 2014

Router firmware Prior to August 2014

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-34117 - Proof of Concept

CVE-2025-34117 - Proof of Concept

References

https://web.archive.org/web/20140828114943/http://blog.tr...
third-party-advisorytechnical-description
https://www.seebug.org/vuldb/ssvid-90227
third-party-advisorytechnical-description
https://raw.githubusercontent.com/rapid7/metasploit-frame...
exploit

EPSS Score

50% chance of being exploited in the next 30 days.

CVSS V4

Score:
9.3
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Trend Micro TrendLabs
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