CVE-2026-84408

HIGHPre-NVD 8.88.8—
EchelonGraph scoreHIGH confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. a secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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: 1%CVSS: 8.8Exploit: None knownExposed: 0

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

QND contains an improper access control vulnerability in a named pipe, which may allow a local attacker who is logged in to a Windows PC where the affected product's client is installed to execute arbitrary commands with SYSTEM privileges.

CVSS v3
8.8
EG Score
8.8(high)
EG Risk
40(Track)
EG Risk 40/100SSVC: 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%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
63%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

JVN#95825631: Multiple vulnerabilities in QND

https://jvn.jp/en/jp/JVN95825631/
generic

QND Windows クライアントの脆弱性について - 製品・サービス | クオリティソフト株式会社

https://www.qualitysoft.com/product/qnd_vulnerabilities_2026/

Vendor Advisories for CVE-2026-84408(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 17× in last 7d / 17× 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. 2026-09-18 23:26 UTCEG score recompute
  2. 2026-09-18 23:26 UTCGHSA enrichment
  3. 2026-09-18 19:28 UTCEPSS rescore
  4. 2026-09-18 10:28 UTCGHSA enrichment
  5. 2026-09-17 21:30 UTCEG score recompute
  6. 2026-09-17 21:30 UTCGHSA enrichment
  7. 2026-09-17 19:32 UTCEPSS rescore
  8. 2026-09-17 08:32 UTCGHSA enrichment
  9. 2026-09-16 19:32 UTCGHSA enrichment
  10. 2026-09-16 15:26 UTCEG score recompute
  11. 2026-09-16 15:26 UTCGHSA enrichment
  12. 2026-09-16 15:06 UTCEG score recompute
  13. 2026-09-16 15:06 UTCGHSA enrichment
  14. 2026-09-16 14:09 UTCEPSS rescore
  15. 2026-09-16 08:26 UTCEG score recompute
  16. 2026-09-16 07:45 UTCEG score recompute
  17. 2026-09-16 07:41 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-84408?
CVE-2026-84408 is a high vulnerability published on September 16, 2026. QND contains an improper access control vulnerability in a named pipe, which may allow a local attacker who is logged in to a Windows PC where the affected product's client is installed to execute arbitrary commands with SYSTEM privileges.
When was CVE-2026-84408 disclosed?
CVE-2026-84408 was first published in the National Vulnerability Database on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-84408 actively exploited?
CVE-2026-84408 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 36.6% of all scored CVEs.
What is the CVSS score of CVE-2026-84408?
CVE-2026-84408 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-84408?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-84408, 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

Explore the affected products and dependency analysis for CVE-2026-84408

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