Buffer Overflow Vulnerability in TOTOLINK T6 MQTT Service
CVE-2025-7912

8.7HIGH

Key Information:

Vendor

Totolink
Status
T6
Vendor
CVE Published:
20 July 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-7912?

A significant vulnerability has been identified in the MQTT service of the TOTOLINK T6 product. The flaw resides in the recvSlaveUpgstatus function, where improper handling of input arguments can trigger a buffer overflow. This can potentially allow remote attackers to execute arbitrary code on the device. The vulnerability has been publicly disclosed, highlighting the urgent need for users to assess and mitigate the risk associated with this security issue.

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-2025-7912 - Proof of Concept

References

https://vuldb.com/?id.317027
vdb-entrytechnical-description
https://vuldb.com/?ctiid.317027
signaturepermissions-required
https://vuldb.com/?submit.618655
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-2025-7912 : Buffer Overflow Vulnerability in TOTOLINK T6 MQTT Service