CVE-2025-3667: TOTOLINK A3700R cstecgi.cgi setUPnPCfg access control

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% 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 was found in TOTOLINK A3700R 9.1.2u.5822_B20200513. It has been classified as critical. This affects the function setUPnPCfg of the file /cgi-bin/cstecgi.cgi. The manipulation leads to improper access controls. It is possible to initiate the attack 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-setUPnPCfg-1cb53a41781f802b8b16f973366ee5e3?pvs=4
https://vuldb.com/?ctiid.304845
https://vuldb.com/?id.304845
https://vuldb.com/?submit.551299
https://www.totolink.net/

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