CVE-2026-9436: Totolink A8000RU Web Management cstecgi.cgi setL2tpServerCfg os command injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-25 · updated 2026-07-23
Weakness: CWE-77

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.

Affected products

Totolink A8000RU: 7.1cu.643_b20200521

References

https://github.com/Litengzheng/vuldb_new2/blob/main/A8000RU/vul_357/README.md
https://vuldb.com/submit/813461
https://vuldb.com/submit/813909
https://vuldb.com/vuln/365417
https://vuldb.com/vuln/365417/cti
https://www.totolink.net/

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