---
id: "CVE-2026-129125"
page: "https://infrastack.ai/live/CVE-2026-129125"
kind: "vulnerability"
aliases: ["CVE-2026-129125"]
title: "C-Kermit: remote query flaw lets clients run shell commands on servers"
severity: "critical"
cvss: 9.2
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["c-kermit", "other", "self-hosted", "unix"]
not_affected_if: ["host-commands-not-used", "no-remote-server"]
published_at: "2026-11-13T17:17:29+00:00"
first_seen_at: "2026-11-13T17:48:01+00:00"
updated_at: "2026-11-13T17:48:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-129125", "first_seen_at": "2026-11-13T17:48:01+00:00"}]
exploit_sources: []
---

# C-Kermit: remote query flaw lets clients run shell commands on servers

Link for people: https://infrastack.ai/live/CVE-2026-129125 (this .md is for agents)

C-Kermit versions from 6.0.192 before 11.1.515 let a Kermit client run shell commands on a server even when host commands are disabled. An attacker sends a REMOTE QUERY or a REMOTE ASSIGN macro that reaches RUN, bypassing the nopush restriction and DISABLE HOST.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed C-Kermit version with `kermit` and look for a version from `6.0.192` up to but not including `11.1.515`
- Check whether Kermit server mode is running and reachable from the network, for example with REMOTE settings in the Kermit configuration
- Confirm whether the `DISABLE HOST` setting is in use, since the flaw bypasses it

## Fix

- C-Kermit: upgrade to `11.1.515` or later

## Timeline

- 2026-11-13T17:48:01+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-129125

## Documents

- [advisory] Vendor advisory: github.com https://github.com/OpenKermit/ckermit/security/advisories/GHSA-c5px-7h4c-gj8p
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/c-kermit-6.0.192-before-11.1.515-command-execution-via-remote-query
- [fix] Patch: github.com https://github.com/OpenKermit/ckermit/commit/85ef1da670cee132ea2d8e4eb759bab310ff73c9
- [fix] Release notes: github.com https://github.com/OpenKermit/ckermit/releases/tag/v11.1.515

## From the sources

C-Kermit 6.0.192 before 11.1.515 contains a remote code execution vulnerability that allows Kermit clients to run shell commands on servers with host commands disabled by abusing REMOTE QUERY evaluation. Attackers can send a REMOTE QUERY invoking the command function, or define a macro via REMOTE ASSIGN and call execute to reach RUN, bypassing the nopush restriction and DISABLE HOST.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_