High severity · published Jul 19, 2025
CVE-2025-7837
A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical
8.8
CVSS
1.3%
EPSS
No
On KEV
Description
A vulnerability was found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this issue is the function recvSlaveStaInfo of the component MQTT Service. The manipulation of the argument dest leads to buffer overflow. The attack may be launched 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-2025-7837
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-7837
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/4.md
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/4.md#poc
Permissions Required
https://vuldb.com/?ctiid.316940
Third Party Advisory
https://vuldb.com/?id.316940
Third Party Advisory
https://vuldb.com/?submit.617572
Product
https://www.totolink.net/
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