CVE-2026-9436

CRITICAL

Totolink A8000RU Web Management cstecgi.cgi setL2tpServerCfg os command injection

Title source: cna

Description

A flaw has been found in Totolink A8000RU 7.1cu.643_b20200521. The impacted element is the function setL2tpServerCfg of the file /cgi-bin/cstecgi.cgi of the component Web Management Interface. Executing a manipulation of the argument enable can lead to os command injection. The attack can be executed remotely. The exploit has been published and may be used.

References (6)

Core 6

Core References

Vdb Entry, Technical Description vdb-entry technical-description

VDB-365417 | Totolink A8000RU Web Management cstecgi.cgi setL2tpServerCfg os command injection

https://vuldb.com/vuln/365417

Signature, Permissions Required signature permissions-required

VDB-365417 | CTI Indicators (IOB, IOC, TTP, IOA)

https://vuldb.com/vuln/365417/cti

Third Party Advisory third-party-advisory

Submit #813909 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection

https://vuldb.com/submit/813909

Third Party Advisory third-party-advisory

Submit #813461 | Totolink A8000RU 7.1cu.643_b20200521 Command Injection (Duplicate)

https://vuldb.com/submit/813461

Exploit exploit

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_357/README.md

View Exploit ZIP pw:eip

Product product

https://www.totolink.net/

Scores

CVSS v3 9.8

EPSS 0.0200

EPSS Percentile 78.2%

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