Command Injection Vulnerability in TOTOLINK N600R Router
CVE-2025-9935

6.9MEDIUM

Key Information:

Vendor

Totolink
Status
N600r
Vendor
CVE Published:
3 September 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9935?

A command injection vulnerability affects the TOTOLINK N600R router in the sub_4159F8 function of the cstecgi.cgi file. This vulnerability allows attackers to execute arbitrary commands remotely, potentially compromising the device. The exploit has been made public, increasing the risk of targeted attacks. Users are advised to take immediate measures to secure their devices and apply any available patches to mitigate the threat.

Affected Version(s)

N600R 4.3.0cu.7866_B20220506

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-2025-9935 - Proof of Concept

References

https://vuldb.com/?id.322337
vdb-entrytechnical-description
https://vuldb.com/?ctiid.322337
signaturepermissions-required
https://vuldb.com/?submit.643088
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
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

b55t4ck (VulDB User)
.
CVE-2025-9935 : Command Injection Vulnerability in TOTOLINK N600R Router