Buffer Overflow Vulnerability in TOTOLINK T6 MQTT Service
CVE-2025-7837

8.7HIGH

Key Information:

Vendor

Totolink
Status
T6
Vendor
CVE Published:
19 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7837?

A vulnerability exists in the MQTT Service of the TOTOLINK T6 product, where improper handling of the argument 'dest' in the recvSlaveStaInfo function can lead to a buffer overflow. This flaw allows an attacker to exploit the service remotely, potentially causing unauthorized access or system instability. The details of this vulnerability have been made public, making it imperative for users to take action to mitigate associated risks.

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-2025-7837 - Proof of Concept

References

https://vuldb.com/?id.316940
vdb-entrytechnical-description
https://vuldb.com/?ctiid.316940
signaturepermissions-required
https://vuldb.com/?submit.617572
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-2025-7837 : Buffer Overflow Vulnerability in TOTOLINK T6 MQTT Service