CVE-2026-4976

HIGH

Totolink LR350 cstecgi.cgi setWiFiGuestCfg buffer overflow

Title source: cna

Description

A vulnerability was found in Totolink LR350 9.3.5u.6369_B20220309. This vulnerability affects the function setWiFiGuestCfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument ssid results in buffer overflow. The attack can be launched remotely. The exploit has been made public and could be used.

References (5)

[Vdb Entry, Technical Description] https://vuldb.com/?id.353863

[Signature, Permissions Required] https://vuldb.com/?ctiid.353863

[Third Party Advisory] https://vuldb.com/?submit.778274

[Exploit] https://lavender-bicycle-a5a.notion.site/TOTOLINK-LR350-setWiFiGuestCfg-32153a41781f8048a918c1c78e95064e?source=copy_link

[Product] https://www.totolink.net/

Scores

CVSS v3 8.8

EPSS 0.0016

EPSS Percentile 36.7%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation poc

Automatable no

Technical Impact total

Details

CWE

CWE-119 CWE-120

Status published

Products (2)

Totolink/LR350 9.3.5u.6369_B20220309

totolink/lr350_firmware 9.3.5u.6369_b20220309

Published Mar 27, 2026

Tracked Since Mar 29, 2026