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.
References (6)
Core 6
Core References
Third Party Advisory, VDB Entry vdb-entry
technical-description
https://vuldb.com/?id.317584
Permissions Required signature
permissions-required
https://vuldb.com/?ctiid.317584
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.620834
Exploit, Third Party Advisory related
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/9.md
Exploit, Third Party Advisory exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/9.md#poc
Product product
https://www.totolink.net/
Scores
CVSS v3
8.8
EPSS
0.0059
EPSS Percentile
69.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-119
CWE-120
Status
published
Products (1)
totolink/t6_firmware
v4.1.5cu.748_b20211015
Published
Jul 25, 2025
Tracked Since
Feb 18, 2026