Improper Access Control in TOTOLINK A3700R Router by TOTOLINK
CVE-2025-3665

6.9MEDIUM

Key Information:

Vendor
Totolink
Status
A3700r
Vendor
CVE Published:
16 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A security vulnerability exists in the TOTOLINK A3700R router affecting the setSmartQosCfg function located in the /cgi-bin/cstecgi.cgi file. This flaw allows unauthorized manipulation of access controls, leading to potential exploitation by remote attackers. Despite early notification, the vendor has not provided a response, raising concerns over security practices. Users should be aware of this risk and take necessary precautions.

Affected Version(s)

A3700R 9.1.2u.5822_B20200513

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-2025-3665 - Proof of Concept

References

https://vuldb.com/?id.304843
vdb-entrytechnical-description
https://vuldb.com/?ctiid.304843
signaturepermissions-required
https://vuldb.com/?submit.551297
third-party-advisory

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
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

yhryhryhr_backup (VulDB User)
.