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

Severity: high (CVSS 8.2 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 11.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2025-04-16 · updated 2026-06-17
Weakness: CWE-266

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

TOTOLINK A3700R: 9.1.2u.5822_b20200513

References

https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyCfg-1cb53a41781f809f807efe1284f5eb1a?pvs=4
https://vuldb.com/?ctiid.304841
https://vuldb.com/?id.304841
https://vuldb.com/?submit.551295
https://www.totolink.net/

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