High severity · published Jul 17, 2025
CVE-2025-7758
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 up to 4.1.5cu.748_B20211015
8.8
CVSS
1%
EPSS
No
On KEV
Description
A vulnerability, which was classified as critical, has been found in TOTOLINK T6 up to 4.1.5cu.748_B20211015. Affected by this issue is the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component HTTP POST Request Handler. The manipulation of the argument ip 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)1.0% · higher than 62% 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-2025-7758
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-7758
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/3.md
Exploit
https://github.com/AnduinBrian/Public/blob/main/Totolink%20T6/Vuln/3.md#poc
Permissions Required
https://vuldb.com/?ctiid.316748
Third Party Advisory
https://vuldb.com/?id.316748
Third Party Advisory
https://vuldb.com/?submit.615734
Product
https://www.totolink.net/
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