{"id":"CVE-2026-83621","title":"ntopng is a web-based network traffic monitoring application","summary":"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.…","severity":"high","cvss":8.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","cwe":["CWE-862"],"vendor":"ntop","product":"ntopng","affected":["ntopng < 6.7.260717"],"published":"2026-09-21","updated":"2026-09-21","sourceUpdated":"2026-09-21T21:17:13.577","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-83621","references":[{"url":"https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5","label":"security-advisories@github.com"},{"url":"https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f","label":"security-advisories@github.com"},{"url":"https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-21T19:40:33.282816Z"},"ingestedAt":"2026-09-21T16:49:07.877Z","slug":"CVE-2026-83621","body":"## Overview\n\nntopng 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}