Vulnerability · Published Apr 16, 2025 · Assigned by VulDB

CVE-2025-3663TOTOLINK A3700R Password cstecgi.cgi setWiFiEasyGuestCfg access control

Medium 5.3

In plain English

A medium-severity improper access control in A3700R from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 11.3% (higher than 96% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)11.3%top 4.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability, which was classified as critical, has been found in TOTOLINK A3700R 9.1.2u.5822_B20200513. This issue affects the function setWiFiEasyCfg/setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi of the component Password Handler. The manipulation leads to improper access controls. The attack may be initiated 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.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	A3700R	9.1.2u.5822_B20200513

Weakness: CWE-284, CWE-266 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

References

VDB-304841 | TOTOLINK A3700R Password cstecgi.cgi setWiFiEasyGuestCfg access control vdb-entry, technical-description
VDB-304841 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #551295 | TOTOLINK A3700R V9.1.2u.5822_B20200513 Improper Access Controls third-party-advisory
https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyCfg-1cb53a41781f809f807efe1284f5eb1a?pvs=4 exploit
https://www.totolink.net/ product