---
id: "CVE-2026-77876"
kind: "vulnerability"
aliases: ["CVE-2026-77876"]
title: "Control Web Panel: unescaped file parameter lets users run OS commands"
severity: "critical"
cvss: 9.8
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["control-web-panel", "cwp", "linux", "runtime", "shared-hosting"]
not_affected_if: ["webpanel-1.16-or-later"]
published_at: "2026-11-02T16:17:43+00:00"
first_seen_at: "2026-11-02T16:24:04+00:00"
updated_at: "2026-11-02T16:26:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77876", "first_seen_at": "2026-11-02T16:24:04+00:00"}]
---

# Control Web Panel: unescaped file parameter lets users run OS commands

Control Web Panel (CWP) versions before webpanel_version 1.16 pass the file POST parameter of the acc=deletedp action straight into a shell call without escaping. An attacker who can reach the user panel can run arbitrary operating system commands.

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

## How to check

- Check the installed CWP version in the panel or on the server, and compare it with `webpanel_version` 1.16.

## Fix

- Control Web Panel: upgrade to `webpanel_version` 1.16 or later.

## Timeline

- 2026-11-02T16:24:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-77876

## Documents

- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/control-web-panel-cwp-os-command-injection-via-protected-directory

## From the sources

Control Web Panel (CWP) before webpanel_version 1.16 contains an OS command injection vulnerability in the protected_directory user panel module that allows attackers to execute arbitrary commands by submitting unescaped input through the file POST parameter in the acc=deletedp action. Attackers can exploit this flaw, which passes attacker-controlled input directly into a shell_exec call, to achieve code execution in the user panel context.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_