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CVE

CWE

Training

CVE-2026-1143

Published: Jan 19, 2026

Modified: Feb 23, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

Description

A weakness has been identified in TOTOLINK A3700R 9.1.2u.5822_B20200513. This affects the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. Executing a manipulation of the argument ssid can lead to buffer overflow. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Vendor	Product	Versions
TOTOLINK	A3700R	affected `9.1.2u.5822_B20200513`

Weaknesses (CWE)

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

VDB-341735 | TOTOLINK A3700R cstecgi.cgi setWiFiEasyGuestCfg buffer overflow

vdb-entry

technical-description

VDB-341735 | CTI Indicators (IOB, IOC, IOA)

signature

permissions-required

Submit #735502 | TOTOLINK A3700R V9.1.2u.5822_B20200513 Buffer Overflow

third-party-advisory

https://lavender-bicycle-a5a.notion.site/TOTOLINK-A3700R-setWiFiEasyGuestCfg-2e353a41781f8057a244ead07d5eaaff?source=copy_link

exploit

https://www.totolink.net/

product

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