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CVE-2026-82412: ntopng: Remote Code Execution via OS Command Injection in Vulnerability-Scan REST API

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-21 · updated 2026-09-23
• Weakness: CWE-78

Description

ntopng is a web-based network traffic monitoring application. Prior to 6.7.260717, the vulnerability-scan endpoints scripts/lua/rest/v2/add/host/to_scan.lua and scripts/lua/rest/v2/exec/host/schedule_vulnerability_scan.lua accept the scan_ports parameter without an administrator gate and pass it through validateSingleWord, which permits shell metacharacters. scripts/lua/modules/vulnerability_scan/vs_utils.lua then concatenates scan_ports into an nmap command in nmap_scan_host and executes the command through ntop.execCmd or ntop.execCmdAsync and popen. Any authenticated non-admin user can execute operating-system commands as the ntopng process account when nmap is available. Because the endpoints accept GET requests while ntopng's CSRF validation applies to POST request bodies, an attacker can also trigger the command through a logged-in user's browser without possessing ntopng credentials. This issue is fixed in version 6.7.260717.

Affected products

• ntopng: before 6.7.260717

References

• https://github.com/ntop/ntopng/commit/0d3156274f4d12db8b61432ebeded10966c01f3e
• https://github.com/ntop/ntopng/commit/771b34a9d37f5de989eec4f2f8f2e852db1c7e5e
• https://github.com/ntop/ntopng/commit/838ccd523a3d4a71b29a62f7653e572a1ffa5cf6
• https://github.com/ntop/ntopng/commit/9f42a12251d881e3a20ebd667c1a2e6a6570c270
• https://github.com/ntop/ntopng/security/advisories/GHSA-2c6p-4pfj-qv58

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