CVE-2026-7156

CRITICAL

Totolink A8000RU CGI cstecgi.cgi CsteSystem os command injection

Title source: cna

Description

A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. Affected is the function CsteSystem of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument HTTP results in os command injection. The attack may be launched remotely. The exploit is now public and may be used.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-359755 | Totolink A8000RU CGI cstecgi.cgi CsteSystem os command injection

https://vuldb.com/vuln/359755

Signature, Permissions Required signature permissions-required

VDB-359755 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/359755/cti

Third Party Advisory third-party-advisory

Submit #801142 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/801142

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_320/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0179

EPSS Percentile 75.4%

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/A8000RU 7.1cu.643_b20200521

Published Apr 27, 2026

Tracked Since Apr 28, 2026