High severity · published Jun 30, 2025
CVE-2025-6916
A vulnerability, which was classified as critical, was found in TOTOLINK T6 4.1.5cu.748_B20211015
8.8
CVSS
0.9%
EPSS
No
On KEV
Description
A vulnerability, which was classified as critical, was found in TOTOLINK T6 4.1.5cu.748_B20211015. This affects the function Form_Login of the file /formLoginAuth.htm. The manipulation of the argument authCode/goURL leads to missing authentication. The attack needs to be initiated within the local network. The exploit has been disclosed to the public and may be used.
CVSS vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Adjacent
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 59% 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-2025-6916
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-6916
Exploit
https://github.com/c0nyy/IoT_vuln/blob/main/TOTOLINK%20T6%20Vuln.md
Permissions Required
https://vuldb.com/?ctiid.314409
Third Party Advisory
https://vuldb.com/?id.314409
Third Party Advisory
https://vuldb.com/?submit.605101
Product
https://www.totolink.net/
More from T6 Firmware
9.8
CVE-2025-7862
A vulnerability has been found in TOTOLINK T6 4.1.5cu.748_B20211015 and classified as critical
9.8
CVE-2023-7221
A vulnerability was found in Totolink T6 4.1.9cu.5241_B20210923
9.8
CVE-2022-38828
TOTOLINK T6 V4.1.5cu.709_B20210518 is vulnerable to command injection via cstecgi.cgi
9.8
CVE-2022-38827
TOTOLINK T6 V4.1.5cu.709_B20210518 is vulnerable to Buffer Overflow via cstecgi.cgi
9.8
CVE-2022-38826
In TOTOLINK T6 V4.1.5cu.709_B20210518, there is an execute arbitrary command in cstecgi.cgi