CVE-2025-3666

Public Exploit
TOTOLINK A3700R cstecgi.cgi setDdnsCfg access control

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.

Category

6.9
CVSS
Severity: Medium
CVSS 4.0 •
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.20%
Third-Party Advisory vuldb.com Third-Party Advisory notion.site Third-Party Advisory vuldb.com
Affected: TOTOLINK A3700R
Published at:
Updated at:

References

Link Tags
https://vuldb.com/?id.304844 third party advisory vdb entry technical description
https://vuldb.com/?ctiid.304844 signature permissions required
https://vuldb.com/?submit.551298 third party advisory vdb entry
https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setDdnsCfg-1cb53a41781f8001b9c0f345a120e2e7?pvs=4 third party advisory exploit
https://www.totolink.net/ product

Frequently Asked Questions

What is the severity of CVE-2025-3666?
CVE-2025-3666 has been scored as a medium severity vulnerability.
How to fix CVE-2025-3666?
To fix CVE-2025-3666, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-3666 being actively exploited in the wild?
It is possible that CVE-2025-3666 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-3666?
CVE-2025-3666 affects TOTOLINK A3700R.
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