---
title: "CVE-2026-83621: ntopng - Broken Access Control"
description: "ntopng < 6.7.260717 contains a broken access control vulnerability caused by missing administrator check in edit_blacklist.lua, letting authenticated non-admin users modify threat-intelligence settings, exploit requires authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-83621/
---

# CVE-2026-83621 ntopng - Broken Access Control

ntopng < 6.7.260717 contains a broken access control vulnerability caused by missing administrator check in edit\_blacklist.lua, letting authenticated non-admin users modify threat-intelligence settings, exploit requires authentication.

CVSS base score 8.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.53% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-83621)

## Details

Type

Broken Access Control

Impact

Broken Access Control, Denial Of Service

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Published

21 September 2026

Updated

15 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Update to version 6.7.260717 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-83621](https://nvd.nist.gov/vuln/detail/CVE-2026-83621)
- [https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5](https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5)
- [https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f](https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f)
- [https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8](https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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