High severity · published Sep 3, 2026
CVE-2026-84989
ntopng's Missing Authorization in REST API Allows Non-Admin Users to Delete and Rename Arbitrary Tags
7.1
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 32% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NT
ntopng · ntop
>= 6.7.0, < 6.7.260718 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-84989
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-84989
github.com
https://github.com/ntop/ntopng/commit/0e41f24b367fb9caf750459da67827326e3289e8
github.com
https://github.com/ntop/ntopng/security/advisories/GHSA-43p9-5758-wwq8
More from ntopng
9.8
CVE-2026-38968
ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking
8.8
CVE-2026-84990
ntopng: Missing Authorization on System Configuration Backup Download and Listing
8.8
CVE-2026-82412
ntopng: Remote Code Execution via OS Command Injection in Vulnerability-Scan REST API
8.8
CVE-2017-5473
Cross-site request forgery (CSRF) vulnerability in ntopng through 2.4 allows remote attackers to hijack the authentication of arbitrary users, as demonstrated by…
8.1
CVE-2026-83621
ntopng: Missing Authorization Check in REST API Allows Non-Admin Users to Tamper Threat Intelligence Blacklist URLs