CVE-2026-84990

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 8.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5%, top 63% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
37%
KEV
Not listed

Published

September 21, 2026

Last Modified

September 23, 2026

Advisory Details (2)

Auto-updated Sep 21, 2026
🔬 Proof of concept available. Patch available. Sources: github, github_commit.
github_commit

commit f912ee93bc14 (ntop/ntopng)

Fix landed in ntop/ntopng commit f912ee93bc14 — awaiting tagged release

https://github.com/ntop/ntopng/commit/f912ee93bc143330b6ff3bb946ee7211e5ee9e1a
github Patch Available🟡 PoC Available

Missing Authorization on System Configuration Backup Download and Listing · Advisory · ntop/ntopng · GitHub

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

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 14× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-25 02:40 UTCVendor advisory
  2. 2026-09-24 15:33 UTCEG score recompute
  3. 2026-09-24 15:33 UTCVendor advisory
  4. 2026-09-24 14:04 UTCEPSS rescore
  5. 2026-09-24 04:27 UTCEG score recompute
  6. 2026-09-24 04:27 UTCVendor advisory
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-23 17:20 UTCVendor advisory
  9. 2026-09-23 13:51 UTCVendor advisory
  10. 2026-09-23 02:44 UTCEG score recompute
  11. 2026-09-22 16:01 UTCEPSS rescore
  12. 2026-09-21 17:25 UTCEG score recompute
  13. 2026-09-21 16:25 UTCEG score recompute
  14. 2026-09-21 16:25 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-84990?
CVE-2026-84990 is a high vulnerability published on September 21, 2026. ntopng is a web-based network traffic monitoring application. Prior to 6.7.260718, scripts/lua/rest/v2/get/system/configurations/listavailablebackups.lua and scripts/lua/rest/v2/get/system/configurations/downloadbackup.lua allow any authenticated non-admin user to list and download…
When was CVE-2026-84990 disclosed?
CVE-2026-84990 was first published in the National Vulnerability Database on September 21, 2026, with the most recent update on September 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84990 actively exploited?
CVE-2026-84990 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 63.1% of all scored CVEs.
What is the CVSS score of CVE-2026-84990?
CVE-2026-84990 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-84990?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84990, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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