Buffer Overflow Vulnerability in TOTOLINK T6 HTTP POST Request Handler
CVE-2025-7758

8.7HIGH

Key Information:

Vendor

Totolink
Status
T6
Vendor
CVE Published:
17 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7758?

A security flaw exists in the TOTOLINK T6 due to improper validation of the 'ip' argument in the setDiagnosisCfg function within the /cgi-bin/cstecgi.cgi component. This vulnerability allows an attacker to manipulate the HTTP POST request, potentially leading to a buffer overflow. The vulnerability can be exploited remotely, making it imperative for users to apply mitigation strategies to secure their devices.

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-2025-7758 - Proof of Concept

References

https://vuldb.com/?id.316748
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316748
signaturepermissions-required
https://vuldb.com/?submit.615734
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
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

reisen_1943 (VulDB User)
.
CVE-2025-7758 : Buffer Overflow Vulnerability in TOTOLINK T6 HTTP POST Request Handler