Authentication Bypass in TOTOLINK T6 Product by TOTOLINK
CVE-2025-6916

8.7HIGH

Key Information:

Vendor

Totolink
Status
T6
Vendor
CVE Published:
30 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6916?

The TOTOLINK T6 device has a vulnerability in the Form_Login function located in the /formLoginAuth.htm file. This flaw allows an attacker with access to the local network to manipulate parameters such as authCode and goURL, resulting in missing authentication checks. Exploitation could lead to unauthorized access to the device, as the vulnerability has been publicly disclosed and is easily reproducible.

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Affected Version(s)

T6 4.1.5cu.748_B20211015

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-2025-6916 - Proof of Concept

References

https://vuldb.com/?id.314409
vdb-entrytechnical-description
https://vuldb.com/?ctiid.314409
signaturepermissions-required
https://vuldb.com/?submit.605101
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Adjacent 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

c0nyy (VulDB User)
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