CVE-2026-6138

CRITICAL

Totolink A7100RU CGI cstecgi.cgi setAccessDeviceCfg os command injection

Title source: cna

Description

A flaw has been found in Totolink A7100RU 7.4cu.2313_b20191024. The impacted element is the function setAccessDeviceCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. This manipulation of the argument mac causes os command injection. The attack can be initiated remotely. The exploit has been published and may be used.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-357002 | Totolink A7100RU CGI cstecgi.cgi setAccessDeviceCfg os command injection

https://vuldb.com/vuln/357002

Signature, Permissions Required signature permissions-required

VDB-357002 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/357002/cti

Third Party Advisory third-party-advisory

Submit #792980 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/792980

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_191/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0182

EPSS Percentile 75.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation poc

Automatable yes

Technical Impact total

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A7100RU 7.4cu.2313_b20191024

Published Apr 13, 2026

Tracked Since Apr 13, 2026