Medium severity · published Apr 16, 2025
CVE-2025-3666
TOTOLINK A3700R cstecgi.cgi setDdnsCfg access control
5.3
CVSS
0.6%
EPSS
No
On KEV
Description
A vulnerability was found in TOTOLINK A3700R 9.1.2u.5822_B20200513 and classified as critical. Affected by this issue is the function setDdnsCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 50% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
A3
A3700R · TOTOLINK
9.1.2u.5822_B20200513 · source: vendor
AF
A3700r Firmware · Totolink
9.1.2u.5822_b20200513 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-3666
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-3666
Exploit
https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setDdnsCfg-1cb53a41781f8001b9c0f345a120e2e7?pvs=4
Permissions Required
https://vuldb.com/?ctiid.304844
Third Party Advisory
https://vuldb.com/?id.304844
Third Party Advisory
https://vuldb.com/?submit.551298
Product
https://www.totolink.net/
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