High severity · published Jul 20, 2025
CVE-2025-7912
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 4.1.5cu.748_B20211015
8.8
CVSS
1.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.3% · higher than 70% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
TF
T6 Firmware · Totolink
v4.1.5cu.748_b20211015 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-7912
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-7912
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/6.md
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/6.md#poc
Permissions Required
https://vuldb.com/?ctiid.317027
Third Party Advisory
https://vuldb.com/?id.317027
Third Party Advisory
https://vuldb.com/?submit.618655
Product
https://www.totolink.net/
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