Critical severity · published Jul 20, 2025
CVE-2025-7862
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical
9.8
CVSS
1.2%
EPSS
No
On KEV
Description
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical. Affected by this vulnerability is the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component Telnet Service. The manipulation of the argument telnet_enabled with the input 1 leads to missing authentication. The attack can 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:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.2% · higher than 68% 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-2025-7862
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-7862
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/5.md#poc-http
Permissions Required
https://vuldb.com/?ctiid.316975
Third Party Advisory
https://vuldb.com/?id.316975
Third Party Advisory
https://vuldb.com/?submit.617643
Product
https://www.totolink.net/
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