CVE-2026-6155

CRITICAL

Totolink A7100RU CGI cstecgi.cgi setWanCfg os command injection

Title source: cna

Description

A weakness has been identified in Totolink A7100RU 7.4cu.2313. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument pppoeServiceName can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-357035 | Totolink A7100RU CGI cstecgi.cgi setWanCfg os command injection

https://vuldb.com/vuln/357035

Signature, Permissions Required signature permissions-required

VDB-357035 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/357035/cti

Third Party Advisory third-party-advisory

Submit #793679 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/793679

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_196/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0180

EPSS Percentile 75.6%

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

Published Apr 13, 2026

Tracked Since Apr 13, 2026