Improper Access Control Vulnerability in TOTOLINK A3700R Router
CVE-2025-3667

6.9MEDIUM

Key Information:

Vendor

Totolink
Status
A3700r
Vendor
CVE Published:
16 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3667?

The TOTOLINK A3700R router exhibits a vulnerability in the setUPnPCfg function, located in the /cgi-bin/cstecgi.cgi file. This flaw can lead to improper access controls, allowing attackers to manipulate settings or data remotely. The issue has been publicly disclosed, raising concerns for users, particularly as the vendor has not provided a timely response to the notification regarding this security risk.

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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-2025-3667 - Proof of Concept

References

https://vuldb.com/?id.304845
vdb-entrytechnical-description
https://vuldb.com/?ctiid.304845
signaturepermissions-required
https://vuldb.com/?submit.551299
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_tutu (VulDB User)
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