CVE-2026-15579

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: 0.4%, top 64% 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 — 3 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.

An out-of-bounds write vulnerability exists in some of the Ethernet switches because of improper validation of the username field length during Web login processing. This may allow a remote attacker to submit a specially crafted overly long input, triggering a buffer overflow that can cause the authentication process to crash and result in a Denial of Service (DoS) attack.

CVSS v3
8.8
EG Score
8.8(medium)
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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
36%
KEV
Not listed

Published

September 18, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 18, 2026
No patch confirmed yet.
generic

CVE-2026-15579: Out-of-bounds Write Vulnerability in Ethernet Switch | Moxa

https://www.moxa.com/en/support/product-support/security-advisory/mpsa-252620-cve-2026-15579-out-of-bounds-write-vulnerability-in-ethernet-switch

Vendor Advisories for CVE-2026-15579(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 21× in last 7d / 26× 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 02:03 UTCEG score recompute
  2. 2026-09-25 02:03 UTCGHSA enrichment
  3. 2026-09-24 13:28 UTCGHSA enrichment
  4. 2026-09-24 00:53 UTCEG score recompute
  5. 2026-09-24 00:53 UTCGHSA enrichment
  6. 2026-09-23 12:19 UTCGHSA enrichment
  7. 2026-09-22 23:45 UTCEG score recompute
  8. 2026-09-22 23:45 UTCGHSA enrichment
  9. 2026-09-22 11:10 UTCGHSA enrichment
  10. 2026-09-21 22:35 UTCEG score recompute
  11. 2026-09-21 22:35 UTCGHSA enrichment
  12. 2026-09-21 10:01 UTCGHSA enrichment
  13. 2026-09-20 21:27 UTCEG score recompute
  14. 2026-09-20 21:27 UTCGHSA enrichment
  15. 2026-09-20 08:52 UTCGHSA enrichment
  16. 2026-09-19 20:17 UTCEG score recompute
  17. 2026-09-19 20:17 UTCGHSA enrichment
  18. 2026-09-19 07:43 UTCEG score recompute
  19. 2026-09-19 07:42 UTCGHSA enrichment
  20. 2026-09-18 19:27 UTCEPSS rescore
  21. 2026-09-18 19:08 UTCGHSA enrichment
  22. 2026-09-18 11:20 UTCEG score recompute
  23. 2026-09-18 10:44 UTCEG score recompute
  24. 2026-09-18 10:19 UTCEG score recompute
  25. 2026-09-18 09:44 UTCEG score recompute
Show 1 more
  1. 2026-09-18 09:44 UTCMITRE cvelistV5first tracked

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Frequently asked(5)

What is CVE-2026-15579?
CVE-2026-15579 is a high vulnerability published on September 18, 2026. An out-of-bounds write vulnerability exists in some of the Ethernet switches because of improper validation of the username field length during Web login processing. This may allow a remote attacker to submit a specially crafted overly long input, triggering a buffer overflow that can cause the…
When was CVE-2026-15579 disclosed?
CVE-2026-15579 was first published in the National Vulnerability Database on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-15579 actively exploited?
CVE-2026-15579 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 64.3% of all scored CVEs.
What is the CVSS score of CVE-2026-15579?
CVE-2026-15579 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-15579?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-15579, 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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