---
id: CVE-2026-82413
title: >-
  ntopng: authenticated (non-admin) OS command injection via the
  vulnerability-scan `scan_ports` parameter (`nmap` argument reaches `popen`)
summary: >-
  ntopng is a web-based network traffic monitoring application. Prior to
  6.7.260717, scripts/lua/rest/v2/add/host/to_scan.lua and
  scripts/lua/rest/v2/exec/host/schedule_vulnerability_scan.lua accept
  scan_ports from any authenticated sessio…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-77
  - CWE-78
  - CWE-88
vendor: ntop
product: ntopng
affected:
  - ntopng < 6.7.260717
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T16:04:14.697Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-82413'
references:
  - url: 'https://github.com/ntop/ntopng/security/advisories/GHSA-9xj6-f266-r46p'
    label: 'https://github.com/ntop/ntopng/security/advisories/GHSA-9xj6-f266-r46p'
  - url: >-
      https://github.com/ntop/ntopng/commit/fda269014c6a8a445c2c893cf9d2fad0128364a5
    label: >-
      https://github.com/ntop/ntopng/commit/fda269014c6a8a445c2c893cf9d2fad0128364a5
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.324Z'
---

## Overview

ntopng is a web-based network traffic monitoring application. Prior to 6.7.260717, scripts/lua/rest/v2/add/host/to_scan.lua and scripts/lua/rest/v2/exec/host/schedule_vulnerability_scan.lua accept scan_ports from any authenticated session, including non-administrator users, while deployments with login disabled expose the same request without authentication. The endpoints validate scan_ports with validateSingleWord, which permits shell metacharacters, and persist the value for the minute vulnerability-scan scheduler. The scheduler concatenates the value into an nmap command through nmap_scan_host and executes it through ntop.execCmd or ntop.execCmdAsync using popen. For the tcp_portscan and cve modules, a preliminary nmap -sn probe must first report the target as up before the attacker-controlled ports are used. When nmap is installed, this command injection allows arbitrary operating-system commands to execute as the ntopng service account without further user interaction. This issue is fixed in version 6.7.260717.

## Affected

- `ntopng < 6.7.260717`

## Remediation

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