Improper Access Control in TOTOLINK A3700R Router
CVE-2025-3668

6.9MEDIUM

Key Information:

Vendor
Totolink
Status
A3700r
Vendor
CVE Published:
16 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A significant vulnerability exists in the TOTOLINK A3700R router, particularly in the setScheduleCfg function located in the /cgi-bin/cstecgi.cgi file. This weakness allows for improper access controls, which can be exploited remotely without any authentication requirements. The disclosed vulnerability poses a risk to users, as it can lead to unauthorized manipulations of router settings. Despite prior notifications, the vendor has yet to provide a response or patch for this security issue.

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-2025-3668 - Proof of Concept

References

https://vuldb.com/?id.304846
vdb-entrytechnical-description
https://vuldb.com/?ctiid.304846
signaturepermissions-required
https://vuldb.com/?submit.551300
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_miemie (VulDB User)
.