Termix-SSH Termix up to 2.5.0 ACME acme-ssl-routes.ts child_process.execSync email os command injection

Summaryinfo

A vulnerability classified as problematic was found in Termix-SSH Termix up to 2.5.0. Affected by this vulnerability is the function child_process.execSync of the file src/backend/database/routes/acme-ssl-routes.ts of the component ACME. Executing a manipulation of the argument email can lead to os command injection. This vulnerability is handled as CVE-2026-79766. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Termix-SSH Termix up to 2.5.0 and classified as problematic. This vulnerability affects the function child_process.execSync of the file src/backend/database/routes/acme-ssl-routes.ts of the component ACME. The manipulation of the argument email with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. 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. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Termix is a web-based server management platform with SSH terminal, tunneling, and file editing capabilities. From 2.4.1 until 2.5.1, an authenticated Termix administrator can store attacker-controlled domain and email values through PATCH /users/acme-ssl-settings and trigger their interpolation into a certbot shell command through POST /users/acme-ssl-request. In src/backend/database/routes/acme-ssl-routes.ts, child_process.execSync invokes /bin/sh -c with those values only wrapped in double quotes, so shell metacharacters can execute arbitrary operating-system commands as the Termix backend process. Both HTTP webroot and DNS Cloudflare challenge modes are affected, and compromise exposes Termix databases, process secrets, stored credentials, and network reachability. This issue is fixed in version 2.5.1.

The advisory is available at github.com. This vulnerability was named CVE-2026-79766 since 08/25/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 2.5.1 eliminates this vulnerability.

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Productinfo

Type

• SSH Server Software

Vendor

• Termix-SSH

Name

• Termix

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5.0

Website

• Product: https://github.com/Termix-SSH/Termix/

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