Buffer Overflow Vulnerability in TOTOLINK T6 MQTT Service
CVE-2025-7913

8.7HIGH

Key Information:

Vendor

Totolink
Status
T6
Vendor
CVE Published:
21 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7913?

A buffer overflow vulnerability has been identified in the function 'updateWifiInfo' of the MQTT Service utilized in the TOTOLINK T6 device. This flaw allows an attacker to manipulate the 'serverIp' argument, leading to potential exploitation. The vulnerability can be triggered remotely, posing a significant threat to users. It has been publicly disclosed, making it imperative for users to take immediate action to secure their devices against possible exploits.

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-2025-7913 - Proof of Concept

References

https://vuldb.com/?id.317028
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317028
signaturepermissions-required
https://vuldb.com/?submit.618656
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

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CVE-2025-7913 : Buffer Overflow Vulnerability in TOTOLINK T6 MQTT Service