CVE-2026-7538

CRITICAL

Totolink A8000RU CGI cstecgi.cgi vulnerability os command injection

Title source: cna

Description

A vulnerability was identified in Totolink A8000RU 7.1cu.643_b20200521. This issue affects the function Vulnerability of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument proto leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-360354 | Totolink A8000RU CGI cstecgi.cgi vulnerability os command injection

https://vuldb.com/vuln/360354

Signature, Permissions Required signature permissions-required

VDB-360354 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/360354/cti

Third Party Advisory third-party-advisory

Submit #804321 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/804321

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_329/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 yes

Technical Impact total

Details

CWE

CWE-77 CWE-78

Status published

Products (1)

Totolink/A8000RU 7.1cu.643_b20200521

Published May 01, 2026

Tracked Since May 01, 2026