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8.9
CVE-2026-9436: Totolink A8000RU Web Interface L2TP Server Configuration Vulnerability
CVE-2026-9436
Summary
A vulnerability in the Totolink A8000RU's web interface allows an attacker to execute unauthorized system commands. This can happen if an attacker sends a malicious request to the router. To protect your network, update the router's firmware to the latest version.
Original title
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. Exec...
Original 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.
nvd CVSS2.0
10.0
nvd CVSS3.1
9.8
nvd CVSS4.0
8.9
Vulnerability type
CWE-77
Command Injection
CWE-78
OS Command Injection
Published: 25 May 2026 · Updated: 1 Jun 2026 · First seen: 26 May 2026