Improper Access Controls in TOTOLINK A3700R Router
CVE-2025-3675

6.9MEDIUM

Key Information:

Vendor

Totolink
Status
A3700r
Vendor
CVE Published:
16 April 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-3675?

A vulnerability has been identified in the TOTOLINK A3700R router, specifically in the setL2tpServerCfg function located in /cgi-bin/cstecgi.cgi. This flaw allows for improper access control, potentially enabling remote attackers to exploit the system. Due to the public disclosure of this vulnerability, it poses a significant risk to users if left unaddressed.

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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-2025-3675 - Proof of Concept

References

https://vuldb.com/?id.304964
vdb-entrytechnical-description
https://vuldb.com/?ctiid.304964
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https://vuldb.com/?submit.551304
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

wxhwxhwxh_ (VulDB User)
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