CVE-2026-84990 ntopng: Missing Authorization on System Configuration Backup Download and Listing
Authenticated non-admin users can download system configuration backups containing sensitive credentials, leading to potential account compromise.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84990?
CVE-2026-84990 is a high-severity missing authorization vulnerability in ntopng, published on 21 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
ntopng is a web-based network traffic monitoring application. Prior to 6.7.260718, scripts/lua/rest/v2/get/system/configurations/list_available_backups.lua and scripts/lua/rest/v2/get/system/configurations/download_backup.lua allow any authenticated non-admin user to list and download system-configuration backups without an administrator check. The download path reaches backup_config.export_backup, and prefs_dump_utils.build_prefs_dump_table includes the ntopng.user.* Redis key space in the backup. A downloaded backup can therefore disclose password hashes for local users and, when configured, API tokens, TOTP secrets, and WebAuthn credential data, enabling account compromise through usable or recoverable credentials. This issue is fixed in version 6.7.260718.
Which versions are affected by CVE-2026-84990?
How do I fix CVE-2026-84990?
No fix has been published for CVE-2026-84990 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-84990 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-84990 exists.
Sources
Also known as AZL-103401, GHSA-7gqc-vjwr-6rh5, UBUNTU-CVE-2026-84990.