CVE-2026-84989: Ntop Ntopng

High severity, CVSS 7.1. EPSS: 0.4% chance of exploitation in the next 30 days.

ntopng is a web-based network traffic monitoring application. In versions 6.7.0 through 6.7.260717, two REST v2 endpoints that manage ntopng's tag/badge feature — `POST /lua/rest/v2/delete/tag/tag.lua` and `POST /lua/rest/v2/edit/tag/tag.lua` — perform no authorization check at all. Any authenticated user, including a non-administrator ("unprivileged") account, can delete or rename any tag in the system, including tags created by an administrator. Version 6.7.260718 contains a fix.

Affected products

• Ntop Ntopng: from 6.7.0, before 6.7.260718 (fixed in 6.7.260718)

Published 2026-09-03. Last modified 2026-09-09.