{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "source": "REFERENCES"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1d0627d802c59130c82478a4eb7f14014064eae5"
            },
            {
              "fixed": "669589fe208fc932fe40a840e0de8e4d9df6023f"
            }
          ],
          "repo": "https://github.com/ntop/ntopng",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-ffg5-889g-f5q8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-862"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83621.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "fixed": "6.7.260717"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "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.",
  "id": "CVE-2026-83621",
  "modified": "2026-09-25T03:31:13.417610227Z",
  "published": "2026-09-21T16:08:23.333Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83621.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ntop/ntopng/security/advisories/GHSA-ffg5-889g-f5q8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-83621"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ntop/ntopng/commit/1d0627d802c59130c82478a4eb7f14014064eae5"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ntop/ntopng/commit/669589fe208fc932fe40a840e0de8e4d9df6023f"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "ntopng: Missing Authorization Check in REST API Allows Non-Admin Users to Tamper Threat Intelligence Blacklist URLs"
}