---
id: CVE-2026-79766
title: >-
  Termix is a web-based server management platform with SSH terminal, tunneling,
  and file editing capabilities
summary: >-
  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
  PAT…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-78
vendor: Termix-SSH
product: Termix
affected:
  - 'Termix >= 2.4.1, < 2.5.1'
published: '2026-09-24'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T13:22:04.673'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-79766'
references:
  - url: >-
      https://github.com/Termix-SSH/Termix/commit/c7a9063a72071153723e668787548766c971f029
    label: security-advisories@github.com
  - url: >-
      https://github.com/Termix-SSH/Termix/commit/ddbdd5c437c2296607dfaa4265d6f63fbc1ca92e
    label: security-advisories@github.com
  - url: 'https://github.com/Termix-SSH/Termix/pull/1067'
    label: security-advisories@github.com
  - url: 'https://github.com/Termix-SSH/Termix/releases/tag/release-2.5.1-tag'
    label: security-advisories@github.com
  - url: >-
      https://github.com/Termix-SSH/Termix/security/advisories/GHSA-pr55-25gf-5f9v
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-24T16:47:15.907Z'
epss: 0.00388
epssPercentile: 0.30118
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.