CVE-2026-6155: Totolink A7100RU CGI cstecgi.cgi setWanCfg os command injection

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-13 · updated 2026-10-26
Weakness: CWE-77

Description

A weakness has been identified in Totolink A7100RU 7.4cu.2313. The impacted element is the function setWanCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. Executing a manipulation of the argument pppoeServiceName can lead to os command injection. The attack may be launched remotely. The exploit has been made available to the public and could be used for attacks.

Affected products

Totolink A7100RU: 7.4cu.2313

References

https://github.com/Litengzheng/vuldb_new/blob/main/A7100RU/vul_196/README.md
https://vuldb.com/submit/793679
https://vuldb.com/vuln/357035
https://vuldb.com/vuln/357035/cti
https://www.totolink.net/

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