CVE-2026-5676

Totolink A8000R cstecgi.cgi setLanguageCfg missing authentication

State: Published
Severity: 6.9 Medium
Published: Apr 6, 2026
Updated: Apr 7, 2026
Reserved: Apr 6, 2026

Description

A vulnerability was identified in Totolink A8000R 5.9c.681_B20180413. This issue affects the function setLanguageCfg of the file /cgi-bin/cstecgi.cgi. Such manipulation of the argument langType leads to missing authentication. The attack can be launched remotely. The exploit is publicly available and might be used.

Scores

CVSS	Score	Vector	Source
4.0	6.9 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P	VulDB
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R	VulDB
3.0	7.3 High	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:W/RC:R	VulDB
2.0	7.5 High	AV:N/AC:L/Au:N/C:P/I:P/A:P/E:POC/RL:W/RC:UR	VulDB

Weaknesses

CWE-306 Missing Authentication
CWE-287 Improper Authentication

Affected Products

Product	Versions
A8000RTotolink	5.9c.681_B20180413Affected

References

VDB-355503 | Totolink A8000R cstecgi.cgi setLanguageCfg missing authenticationvdb-entrytechnical-description
VDB-355503 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
Submit #792433 | Totolink A8000R V5.9c.681_B20180413 Improper Authenticationthird-party-advisory
https://github.com/skeetabc/CVE-TOTOLINK-A800R/blob/main/vuln1_auth_bypass.mdexploit
https://www.totolink.net/product

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