Description
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 4.1.5cu.748_B20211015. This issue affects the function recvSlaveUpgstatus of the component MQTT Service. The manipulation of the argument s leads to buffer overflow. The attack may 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.317027
Permissions Required signature
permissions-required
https://vuldb.com/?ctiid.317027
Third Party Advisory, VDB Entry third-party-advisory
https://vuldb.com/?submit.618655
Exploit, Third Party Advisory related
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/6.md
Exploit, Third Party Advisory exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/6.md#poc
Product product
https://www.totolink.net/
Scores
CVSS v3
8.8
EPSS
0.0060
EPSS Percentile
69.4%
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
total
Details
CWE
CWE-119
CWE-120
Status
published
Products (1)
totolink/t6_firmware
v4.1.5cu.748_b20211015
Published
Jul 20, 2025
Tracked Since
Feb 18, 2026