CVE-2025-55086

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.8 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 86% 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, nvd
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

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

In NetXDuo version before 6.4.4, a networking support module for Eclipse Foundation ThreadX, in the DHCPV6 client there was an unchecked index extracting the server DUID from the server reply. With a crafted packet, an attacker could cause an out of memory read.

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
29.7%
KEV
Not listed

Published

October 20, 2025

Last Modified

October 24, 2025

Advisory Details (1)

Auto-updated Jun 13, 2026
Patch available. Sources: github.
github Patch Available

dhcvpv6 client: Unchecked Server-Side Malicious Packet · Advisory · eclipse-threadx/netxduo · GitHub

https://github.com/eclipse-threadx/netxduo/security/advisories/GHSA-99pw-cp79-2j5j

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 43× 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. 2026-07-22 14:08 UTCEPSS rescore
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-21 15:24 UTCEPSS rescore
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  20. 2026-07-09 19:09 UTCEPSS rescore
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  23. 2026-07-06 16:27 UTCEPSS rescore
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  25. 2026-07-06 11:41 UTCOSV refresh
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  1. 2026-07-06 02:23 UTCEPSS rescore
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  5. 2026-07-02 17:01 UTCEPSS rescore
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  7. 2026-06-30 23:22 UTCEPSS rescore
  8. 2026-06-29 14:06 UTCEPSS rescore
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  10. 2026-06-28 14:07 UTCEPSS rescore
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  15. 2026-06-25 13:49 UTCEPSS rescore
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  18. 2026-06-23 21:32 UTCEPSS rescore
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  20. 2026-06-21 14:56 UTCEPSS rescore
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  22. 2026-06-21 01:59 UTCEPSS rescore
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  24. 2026-06-19 19:25 UTCEPSS rescore
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  26. 2026-06-18 17:52 UTCEPSS rescore
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  28. 2026-06-17 23:35 UTCOSV refresh
  29. 2026-06-17 17:52 UTCEPSS rescore
  30. 2026-06-16 17:52 UTCEPSS rescore
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  32. 2026-06-15 17:48 UTCEPSS rescore
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  35. 2026-06-12 23:11 UTCEPSS rescore
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  40. 2026-06-10 13:22 UTCEPSS rescore
  41. 2026-06-10 13:22 UTCEPSS rescore
  42. 2026-06-08 14:16 UTCEPSS rescore
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  44. 2026-06-07 15:24 UTCEPSS rescore
  45. 2026-06-07 15:24 UTCEPSS rescore
  46. 2026-06-06 13:47 UTCEPSS rescore
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  48. 2026-06-05 22:46 UTCEPSS rescore
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  50. 2026-06-05 06:10 UTCEPSS rescore
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  52. 2026-06-04 13:12 UTCEPSS rescore
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  54. 2026-06-02 20:12 UTCEPSS rescore
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  56. 2026-06-01 13:51 UTCEPSS rescore
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  58. 2026-05-31 22:30 UTCEPSS rescore
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  60. 2026-05-31 00:16 UTCEPSS rescore
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  62. 2026-05-29 20:33 UTCEG score recompute
  63. 2026-05-29 19:20 UTCOSV refresh
  64. 2026-05-29 13:44 UTCEPSS rescore

Frequently asked(5)

What is CVE-2025-55086?
CVE-2025-55086 is a critical vulnerability published on October 20, 2025. In NetXDuo version before 6.4.4, a networking support module for Eclipse Foundation ThreadX, in the DHCPV6 client there was an unchecked index extracting the server DUID from the server reply. With a crafted packet, an attacker could cause an out of memory read.
When was CVE-2025-55086 disclosed?
CVE-2025-55086 was first published in the National Vulnerability Database on October 20, 2025, with the most recent update on October 24, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-55086 actively exploited?
CVE-2025-55086 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 29.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-55086?
CVE-2025-55086 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2025-55086?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-55086, 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.

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