CVE-2026-5994

CRITICAL

Totolink A7100RU CGI cstecgi.cgi setTelnetCfg os command injection

Title source: cna

Description

A security flaw has been discovered in Totolink A7100RU 7.4cu.2313_b20191024. This issue affects the function setTelnetCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument telnet_enabled results in os command injection. The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

References (5)

Core 5

Core References

Signature, Permissions Required signature permissions-required

VDB-356548 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/356548/cti

Third Party Advisory third-party-advisory

Submit #792042 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/792042

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_166/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Vdb Entry, Technical Description vdb-entry technical-description

VDB-356548 | Totolink A7100RU CGI cstecgi.cgi setTelnetCfg os command injection

https://vuldb.com/vuln/356548

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_b20191024

Published Apr 10, 2026

Tracked Since Apr 10, 2026