CVE-2026-6139

CRITICAL

Totolink A7100RU CGI cstecgi.cgi UploadOpenVpnCert os command injection

Title source: cna

Description

A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This affects the function UploadOpenVpnCert of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Such manipulation of the argument FileName leads to os command injection. The attack can be launched remotely. The exploit has been disclosed to the public and may be used.

References (5)

Core 5

Core References

Signature, Permissions Required signature permissions-required

VDB-357003 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/357003/cti

Third Party Advisory third-party-advisory

Submit #792982 | Totolink A7100RU 7.4cu.2313_b20191024 Command Injection

https://vuldb.com/submit/792982

Vdb Entry, Technical Description vdb-entry technical-description

VDB-357003 | Totolink A7100RU CGI cstecgi.cgi UploadOpenVpnCert os command injection

https://vuldb.com/vuln/357003

Exploit exploit

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_192/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 no

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