CVE-2026-6116: Totolink A7100RU CGI cstecgi.cgi setDiagnosisCfg os command injection

Vulnerability summary

CVE-2026-6116 is a high (CVSS 10.0) Command Injection vulnerability in totolink a7100ru_firmware. EPSS estimates a 3.25% chance of exploitation in the next 30 days, higher than 88.2% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 12-04-2026
   PublishedVulnerability first disclosed.
2. 13-04-2026
   Last modifiedVulnerability information updated.

Description

A vulnerability has been found in Totolink A7100RU 7.4cu.2313_b20191024. This vulnerability affects the function setDiagnosisCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument ip leads to os command injection. Remote exploitation of the attack is possible. The exploit has been disclosed to the public and may be used.

• CWE-77Improper Neutralization of Special Elements used in a Command ('Command Injection')The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.
• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.