CVE-2025-3666: TOTOLINK A3700R cstecgi.cgi setDdnsCfg access control

6.9 CVSS

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. Eine Schwachstelle wurde in TOTOLINK A3700R 9.1.2u.5822_B20200513 gefunden. Sie wurde als kritisch eingestuft. Hierbei geht es um die Funktion setDdnsCfg der Datei /cgi-bin/cstecgi.cgi. Dank Manipulation mit unbekannten Daten kann eine improper access controls-Schwachstelle ausgenutzt werden. Umgesetzt werden kann der Angriff über das Netzwerk. Der Exploit steht zur öffentlichen Verfügung.

Classification

CVE ID: CVE-2025-3666

CVSS Base Severity: MEDIUM

CVSS Base Score: 6.9

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Problem Types

Improper Access Controls Incorrect Privilege Assignment

Affected Products

Vendor: TOTOLINK

Product: A3700R

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.09% (probability of being exploited)

EPSS Percentile: 26.17% (scored less or equal to compared to others)

EPSS Date: 2025-04-18 (when was this score calculated)

References

https://nvd.nist.gov/vuln/detail/CVE-2025-3666
https://vuldb.com/?id.304844
https://vuldb.com/?ctiid.304844
https://vuldb.com/?submit.551298
https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setDdnsCfg-1cb53a41781f8001b9c0f345a120e2e7?pvs=4
https://www.totolink.net/

Timeline