CVE-2026-6140

CRITICAL

Totolink A7100RU CGI cstecgi.cgi UploadFirmwareFile os command injection

Title source: cna

Description

A vulnerability was found in Totolink A7100RU 7.4cu.2313_b20191024. This impacts the function UploadFirmwareFile of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Performing a manipulation of the argument FileName results in os command injection. The attack may be initiated remotely. The exploit has been made public and could be used.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-357004 | Totolink A7100RU CGI cstecgi.cgi UploadFirmwareFile os command injection

https://vuldb.com/vuln/357004

Signature, Permissions Required signature permissions-required

VDB-357004 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/357004/cti

Third Party Advisory third-party-advisory

Submit #792987 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/792987

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_193/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0220

EPSS Percentile 80.1%

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