{"id":"UBUNTU-CVE-2026-83621","details":"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.","modified":"2026-09-23T23:36:44Z","published":"2026-09-21T17:19:00Z","upstream":["CVE-2026-83621"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-83621"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-83621"},{"type":"REPORT","url":"https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5"},{"type":"REPORT","url":"https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f"},{"type":"REPORT","url":"https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8"}],"affected":[{"package":{"name":"ntopng","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=esm-apps%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.2.1+dfsg1-2ubuntu1","2.0+dfsg1-1","2.2+dfsg1-1","2.2+dfsg1-1build1","2.2+dfsg1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_name":"ntopng","binary_version":"2.2+dfsg1-1ubuntu0.1~esm2"},{"binary_name":"ntopng-data","binary_version":"2.2+dfsg1-1ubuntu0.1~esm2"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83621.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.4+dfsg1-3","2.4+dfsg1-4","3.2+dfsg1-1","3.2+dfsg1-1ubuntu0.1~esm2"],"ecosystem_specific":{"binaries":[{"binary_version":"3.2+dfsg1-1ubuntu0.1~esm2","binary_name":"ntopng"},{"binary_version":"3.2+dfsg1-1ubuntu0.1~esm2","binary_name":"ntopng-data"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83621.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:20.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=focal"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.8+dfsg1-2.1build3"],"ecosystem_specific":{"binaries":[{"binary_version":"3.8+dfsg1-2.1build3","binary_name":"ntopng"},{"binary_name":"ntopng-data","binary_version":"3.8+dfsg1-2.1build3"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83621.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1+dfsg1-1"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.1+dfsg1-1","binary_name":"ntopng"},{"binary_version":"5.2.1+dfsg1-1","binary_name":"ntopng-data"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83621.json"}},{"package":{"name":"ntopng","ecosystem":"Ubuntu:24.04:LTS","purl":"pkg:deb/ubuntu/ntopng?arch=source&distro=noble"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.1+dfsg1-1","5.2.1+dfsg1-1ubuntu1","5.2.1+dfsg1-1ubuntu3","5.2.1+dfsg1-1ubuntu4"],"ecosystem_specific":{"binaries":[{"binary_version":"5.2.1+dfsg1-1ubuntu4","binary_name":"ntopng"},{"binary_name":"ntopng-data","binary_version":"5.2.1+dfsg1-1ubuntu4"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-83621.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H"},{"type":"Ubuntu","score":"medium"}]}