Buffer Overflow Vulnerability in TOTOLINK T6 Routers
CVE-2025-8170

8.7HIGH

Key Information:

Vendor

Totolink
Status
T6
Vendor
CVE Published:
25 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-8170?

A vulnerability exists in the TOTOLINK T6 router, specifically in the MQTT Packet Handler's tcpcheck_net function. This issue arises due to improper handling of the serverIp argument, which can lead to a buffer overflow condition. An attacker can exploit this vulnerability remotely, potentially compromising the device functionality. It is crucial for users to be aware of this vulnerability and take necessary precautions, such as applying updates or patches provided by the vendor.

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-2025-8170 - Proof of Concept

References

https://vuldb.com/?id.317584
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317584
signaturepermissions-required
https://vuldb.com/?submit.620834
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-2025-8170 : Buffer Overflow Vulnerability in TOTOLINK T6 Routers