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)

[Vdb Entry, Technical Description] https://vuldb.com/vuln/357004

[Signature, Permissions Required] https://vuldb.com/vuln/357004/cti

[Third Party Advisory] https://vuldb.com/submit/792987

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

View Exploit ZIP pw:eip

[Product] https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0032

EPSS Percentile 55.5%

Attack Vector NETWORK

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

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