CVE-2026-9435

CRITICAL

Totolink A8000RU Web Management cstecgi.cgi setQosCfg os command injection

Title source: cna

Description

A vulnerability was detected in Totolink A8000RU 7.1cu.643_b20200521. The affected element is the function setQosCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Performing a manipulation of the argument enable results in os command injection. Remote exploitation of the attack is possible. The exploit is now public and may be used.

References (5)

Core 5

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-365416 | Totolink A8000RU Web Management cstecgi.cgi setQosCfg os command injection

https://vuldb.com/vuln/365416

Signature, Permissions Required signature permissions-required

VDB-365416 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/365416/cti

Third Party Advisory third-party-advisory

Submit #813908 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/813908

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_356/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0089

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 25, 2026

Tracked Since May 25, 2026