CVE-2025-8170

Name: CVE-2025-8170
Creator: NVD / NIST
Published: 2025-07-25T21:15:28.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.4/10EPSS 1.03%

Last modified Jun 17, 2026

CVE-2025-8170 is a high-severity vulnerability rated 7.4/10 on the CVSS scale. 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. EPSS estimates a 1.03% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

7.4/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

1.03%

59.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Totolink	T6 Firmware	v4.1.5cu.748_b20211015

References

https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/9.mdExploit, Third Party Advisory
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/9.md#pocExploit, Third Party Advisory
https://vuldb.com/?ctiid.317584Permissions Required
https://vuldb.com/?id.317584Third Party Advisory, VDB Entry
https://vuldb.com/?submit.620834Third Party Advisory, VDB Entry
https://www.totolink.net/Product

Timeline

Published: Jul 25, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-8170?

How severe is CVE-2025-8170?

CVE-2025-8170 has a CVSS score of 7.4/10 (HIGH severity). The EPSS model estimates a 1.03% probability of exploitation in the next 30 days.

How do I fix CVE-2025-8170?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-8170?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST