---
cve: "CVE-2026-83621"
severity: "HIGH"
cvss: 8.1
epss: "0.3%"
vendor: "ntop"
kev: false
exploited: false
published: "2026-09-21 17:19:08"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-24T11:25:12+02:00"
---

# CVE-2026-83621

> 8.1 HIGH · 🧪 PoC

## Beschreibung

ntopng is a web-based network traffic monitoring application. Prior to 6.7.260717, POST /lua/rest/v2/edit/system/edit_blacklist.lua in scripts/lua/rest/v2/edit/system/edit_blacklist.lua lacks an administrator check and calls lists_utils.editList for any authenticated user. The list_name, list_enabled, url, and list_update parameters allow a non-admin user to redirect threat-intelligence downloads to attacker-controlled content, disable blocklists, or prevent scheduled updates. The changes are persisted through Redis and reloaded without a lower-level authorization guard, undermining the integrity and availability of ntopng's threat-intelligence monitoring. This issue is fixed in version 6.7.260717.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Keine | good |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 1d0627d802c59130c82478a4eb7f14014064eae5 (Commit)
- 669589fe208fc932fe40a840e0de8e4d9df6023f (Commit)

## Referenzen

- <https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8>
- <https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5>
- <https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-83621) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_