CVE-2025-3663

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in. Limited direct impact.

Exploit odds

11.3% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

No patch or advisory is linked yet. Look at mitigations or restrict exposure.

Timeline

1. 2025-04-16 03:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 09:20 UTC Last updatedMost recent change to the record

Details

Published

2025-04-16 03:15 UTC

Last modified

2026-06-17 09:20 UTC

Exploit probability

11.3% · EPSS, next 30 days

Weakness

CWE-266

Record status

Analyzed

Affected

• Totolink a3700r Firmware 9.1.2u.5822_b20200513

Attack profile CVSS 4.0 · 6.9

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

None

Confidentiality

None

Integrity

Low

Availability

None