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TI-2026-57719 Aliases CVE-2026-83621

ntopng: Missing Authorization Check in REST API Allows Non-Admin Users to Tamper Threat Intelligence Blacklist URLs

Priority LOW 36CWE-862Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-862.

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.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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0053 45th percentileScored 2026-11-07
Fix Fixed ntopng (ntop): 6.7.260717

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ntopntopngbefore 6.7.2607176.7.260717Patch availableCNA
  • ntopng Vendorntop Affected before 6.7.260717 Fixed in 6.7.260717 Patch available CNA

Remediation

  • Fix · CNA ntopng (ntop) Fixed in 6.7.260717

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-83621

References

Other 3

  • TI-2026-58397 ntopng: Missing Authorization on System Configuration Backup Download and Listing CVSS 3.1HIGH 8.8
  • TI-2026-58894 ntopng before 6.7.260717 Missing Authorization on the Host Pool Bulk Delete Handler CVSS 4.0HIGH 7.1
  • TI-2026-58396 ntopng's Missing Authorization in REST API Allows Non-Admin Users to Delete and Rename Arbitrary Tags CVSS 3.1HIGH 7.1
  • TI-2026-85500 Stack buffer overflow in ntopng nDPI custom category detection CVSS 3.1MEDIUM 5.3
  • TI-2026-28235 ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to… CVSS 3.1CRITICAL 9.8
  • TI-2020-09603 In nDPI through 3.2 Stable, the SSH protocol dissector has multiple KEXINIT integer… CVSS 3.1CRITICAL 9.8
See all 31 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences