CVE-2026-90508

LOWPre-NVD 3.43.4—
EchelonGraph scoreHIGH confidence

Score 3.4 from GitHub Security Advisory (severity: LOW) published 2026-09-13. a secondary CVSS source baseline 3.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 5 sources updated this weekElevated
3.4EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 3.4Exploit: Elevated riskExposed: 0

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

A security flaw has been discovered in Chengdu Qilu Technology Ludashi 6.1026.4715.714. Affected by this vulnerability is the function MessageNotifyCallback in the library ProtectFilter64.sys of the component Message Dispatch Handler. Performing a manipulation results in missing authorization. Attacking locally is a requirement. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
3.4
EG Score
3.4(high)
EG Risk
31(Track)
EG Risk 31/100SSVC: 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
Severity34% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

September 13, 2026

Last Modified

September 15, 2026

References (5)

Vendor Advisories for CVE-2026-90508(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 19× 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 19:28 UTCEPSS rescore
  2. 2026-09-18 17:30 UTCEG score recompute
  3. 2026-09-18 17:30 UTCGHSA enrichment
  4. 2026-09-17 19:32 UTCEPSS rescore
  5. 2026-09-16 14:09 UTCEPSS rescore
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-15 15:33 UTCEG score recompute
  8. 2026-09-15 15:33 UTCGHSA enrichment
  9. 2026-09-15 15:31 UTCNVD updateCVSS v4 → 1.8
  10. 2026-09-15 14:18 UTCEG score recompute
  11. 2026-09-15 14:18 UTCGHSA enrichment
  12. 2026-09-15 14:18 UTCMITRE cvelistV5CVSS v4 → 4.6
  13. 2026-09-15 03:12 UTCEPSS rescore
  14. 2026-09-14 21:07 UTCEG score recompute
  15. 2026-09-14 21:07 UTCGHSA enrichment
  16. 2026-09-13 10:19 UTCEG score recompute
  17. 2026-09-13 10:19 UTCNVD updateCVSS v4 → 1.8
  18. 2026-09-13 10:10 UTCEG score recompute
  19. 2026-09-13 10:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-90508?
CVE-2026-90508 is a low vulnerability published on September 13, 2026. A security flaw has been discovered in Chengdu Qilu Technology Ludashi 6.1026.4715.714. Affected by this vulnerability is the function MessageNotifyCallback in the library ProtectFilter64.sys of the component Message Dispatch Handler. Performing a manipulation results in missing authorization.…
When was CVE-2026-90508 disclosed?
CVE-2026-90508 was first published in the National Vulnerability Database on September 13, 2026, with the most recent update on September 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-90508 actively exploited?
CVE-2026-90508 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 98.4% of all scored CVEs.
What is the CVSS score of CVE-2026-90508?
CVE-2026-90508 has a CVSS v3 base score of 3.4 (NVD).
How do I remediate CVE-2026-90508?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-90508, 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-2026-90508

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