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HIGH

CVE-2025-8170

TOTOLINK T6 MQTT Packet meshSlaveDlfw tcpcheck_net buffer overflow

CVSS v3

8.8

HIGH

EPSS Score

1.1 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

poc

SSVC status

Description

A vulnerability classified as critical was found in TOTOLINK T6 4.1.5cu.748_B20211015. This vulnerability affects the function tcpcheck_net of the file /router/meshSlaveDlfw of the component MQTT Packet Handler. The manipulation of the argument serverIp leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Technical details

Published
2025-07-25
Last Modified
2025-08-07

Frequently asked questions

What is CVE-2025-8170?

A vulnerability classified as critical was found in TOTOLINK T6 4.1.5cu.748_B20211015. This vulnerability affects the function tcpcheck_net of the file /router/meshSlaveDlfw of the component MQTT Packet Handler. The manipulation of the argument serverIp leads to buffer overflow. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used.

Is CVE-2025-8170 actively exploited?

A proof-of-concept exploit exists for CVE-2025-8170, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2025-8170?

CVE-2025-8170 has a CVSS v3 base score of 8.8 (HIGH severity).

Is CVE-2025-8170 affecting your environment?

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