Vulnerability · Published Sep 21, 2026 · Assigned by GitHub_M

CVE-2026-84990ntopng: Missing Authorization on System Configuration Backup Download and Listing

High 8.8

In plain English

A high-severity information exposure in ntopng from ntop. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 28% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.3%top 72.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Ubuntu:22.04:LTS	ntopng	no fix listed	UBUNTU-CVE-2026-84990
Ubuntu:24.04:LTS	ntopng	no fix listed	UBUNTU-CVE-2026-84990

Affected products (as reported)

Vendor	Product	Versions
ntop	ntopng	< 6.7.260718

Weakness: CWE-200, CWE-862 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://github.com/ntop/ntopng/security/advisories/GHSA-7gqc-vjwr-6rh5 x_refsource_CONFIRM
https://github.com/ntop/ntopng/commit/f912ee93bc143330b6ff3bb946ee7211e5ee9e1a x_refsource_MISC