Vulnerability Description
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 Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5
- https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f
- https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8
FAQ
What is CVE-2026-83621?
CVE-2026-83621 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 admin...
How severe is CVE-2026-83621?
CVE-2026-83621 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-83621?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.