CVE-2026-85430

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreHIGH confidence

Score 9.1 from GitHub Security Advisory (severity: HIGH) published 2026-09-04. a secondary CVSS source baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

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

MOOS essential-moos through 10.0.1 contains an authentication bypass vulnerability in pShare that accepts UDP datagrams from any source and republishes them with the attacker-claimed identity intact. Attackers can send crafted UDP datagrams to pShare input routes to inject messages into the local MOOS community under spoofed identities, or send malformed datagrams to crash the pShare process.

CVSS v3
9.1
EG Score
9.1(high)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
60%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Sep 15, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

MOOS essential-moos through 10.0.1 pShare Unauthenticated UDP Datagram Republishing | Advisories | VulnCheck

https://www.vulncheck.com/advisories/moos-essential-moos-through-10.0.1-pshare-unauthenticated-udp-datagram-republishing
github_pr

pShare: survive a malformed datagram and allow input routes to be restricted

Upstream fix in progress (PR #18 · themoos/essential-moos, state=open)

https://github.com/themoos/essential-moos/pull/18
github_commit

commit 53729b6325a9 (themoos/essential-moos)

Fix landed in themoos/essential-moos commit 53729b6325a9 — awaiting tagged release

https://github.com/themoos/essential-moos/commit/53729b6325a991a8dbd84dcd04e4707f3e592fd6
generic

essential-moos/Essentials/pShare/Listener.cpp at b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6 · themoos/essential-moos · GitHub

https://github.com/themoos/essential-moos/blob/b897ea86dba8b61412dc48ac0cfb5ff34cdaf5f6/Essentials/pShare/Listener.cpp#L132
generic

GitHub - themoos/essential-moos: a set of useful applications that leverage the core-moos communications layer · GitHub

https://github.com/themoos/essential-moos

Vendor Advisories for CVE-2026-85430(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 56× in last 7d / 132× 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.

Showing the most recent 100 of 132 total refreshes for this CVE.

  1. 2026-09-19 21:43 UTCGHSA enrichment
  2. 2026-09-19 17:56 UTCEG score recompute
  3. 2026-09-19 17:56 UTCGHSA enrichment
  4. 2026-09-19 14:09 UTCGHSA enrichment
  5. 2026-09-19 10:23 UTCGHSA enrichment
  6. 2026-09-19 06:36 UTCGHSA enrichment
  7. 2026-09-19 02:48 UTCGHSA enrichment
  8. 2026-09-18 23:02 UTCEG score recompute
  9. 2026-09-18 23:01 UTCGHSA enrichment
  10. 2026-09-18 19:28 UTCEPSS rescore
  11. 2026-09-18 19:15 UTCGHSA enrichment
  12. 2026-09-18 15:29 UTCGHSA enrichment
  13. 2026-09-18 11:38 UTCGHSA enrichment
  14. 2026-09-18 07:51 UTCGHSA enrichment
  15. 2026-09-18 04:05 UTCGHSA enrichment
  16. 2026-09-18 00:19 UTCGHSA enrichment
  17. 2026-09-17 20:33 UTCEG score recompute
  18. 2026-09-17 20:33 UTCGHSA enrichment
  19. 2026-09-17 19:32 UTCEPSS rescore
  20. 2026-09-17 13:38 UTCGHSA enrichment
  21. 2026-09-17 09:51 UTCGHSA enrichment
  22. 2026-09-17 06:05 UTCGHSA enrichment
  23. 2026-09-17 02:18 UTCGHSA enrichment
  24. 2026-09-16 22:31 UTCGHSA enrichment
  25. 2026-09-16 18:32 UTCEG score recompute
Show 75 more
  1. 2026-09-16 18:31 UTCGHSA enrichment
  2. 2026-09-16 14:09 UTCEPSS rescore
  3. 2026-09-16 12:48 UTCGHSA enrichment
  4. 2026-09-16 09:02 UTCEG score recompute
  5. 2026-09-16 09:02 UTCGHSA enrichment
  6. 2026-09-16 05:15 UTCEPSS rescore
  7. 2026-09-16 04:29 UTCGHSA enrichment
  8. 2026-09-16 00:42 UTCGHSA enrichment
  9. 2026-09-15 20:52 UTCGHSA enrichment
  10. 2026-09-15 17:05 UTCGHSA enrichment
  11. 2026-09-15 13:18 UTCGHSA enrichment
  12. 2026-09-15 09:32 UTCGHSA enrichment
  13. 2026-09-15 05:46 UTCEG score recompute
  14. 2026-09-15 05:45 UTCGHSA enrichment
  15. 2026-09-15 03:12 UTCEPSS rescore
  16. 2026-09-15 03:12 UTCEPSS rescore
  17. 2026-09-15 01:58 UTCGHSA enrichment
  18. 2026-09-14 22:11 UTCGHSA enrichment
  19. 2026-09-14 18:23 UTCGHSA enrichment
  20. 2026-09-14 13:47 UTCGHSA enrichment
  21. 2026-09-14 10:00 UTCGHSA enrichment
  22. 2026-09-14 05:59 UTCGHSA enrichment
  23. 2026-09-14 02:13 UTCGHSA enrichment
  24. 2026-09-13 22:27 UTCGHSA enrichment
  25. 2026-09-13 18:41 UTCEG score recompute
  26. 2026-09-13 18:41 UTCGHSA enrichment
  27. 2026-09-13 14:54 UTCGHSA enrichment
  28. 2026-09-13 10:57 UTCGHSA enrichment
  29. 2026-09-13 07:10 UTCGHSA enrichment
  30. 2026-09-13 03:25 UTCGHSA enrichment
  31. 2026-09-12 23:38 UTCGHSA enrichment
  32. 2026-09-12 19:52 UTCGHSA enrichment
  33. 2026-09-12 16:05 UTCEG score recompute
  34. 2026-09-12 16:05 UTCGHSA enrichment
  35. 2026-09-12 12:19 UTCGHSA enrichment
  36. 2026-09-12 08:32 UTCGHSA enrichment
  37. 2026-09-12 04:45 UTCGHSA enrichment
  38. 2026-09-12 00:59 UTCGHSA enrichment
  39. 2026-09-11 21:13 UTCGHSA enrichment
  40. 2026-09-11 17:26 UTCEG score recompute
  41. 2026-09-11 17:26 UTCGHSA enrichment
  42. 2026-09-11 14:53 UTCEPSS rescore
  43. 2026-09-11 14:53 UTCEPSS rescore
  44. 2026-09-11 13:27 UTCGHSA enrichment
  45. 2026-09-11 09:41 UTCEG score recompute
  46. 2026-09-11 09:41 UTCGHSA enrichment
  47. 2026-09-11 05:54 UTCGHSA enrichment
  48. 2026-09-11 02:08 UTCGHSA enrichment
  49. 2026-09-10 22:21 UTCGHSA enrichment
  50. 2026-09-10 18:33 UTCGHSA enrichment
  51. 2026-09-10 14:47 UTCGHSA enrichment
  52. 2026-09-10 11:01 UTCEG score recompute
  53. 2026-09-10 11:01 UTCGHSA enrichment
  54. 2026-09-10 06:58 UTCGHSA enrichment
  55. 2026-09-10 03:12 UTCGHSA enrichment
  56. 2026-09-09 23:26 UTCGHSA enrichment
  57. 2026-09-09 19:19 UTCGHSA enrichment
  58. 2026-09-09 15:32 UTCGHSA enrichment
  59. 2026-09-09 11:45 UTCGHSA enrichment
  60. 2026-09-09 07:58 UTCGHSA enrichment
  61. 2026-09-09 04:12 UTCGHSA enrichment
  62. 2026-09-09 00:23 UTCEG score recompute
  63. 2026-09-09 00:23 UTCGHSA enrichment
  64. 2026-09-08 22:01 UTCEPSS rescore
  65. 2026-09-08 20:20 UTCGHSA enrichment
  66. 2026-09-08 10:47 UTCGHSA enrichment
  67. 2026-09-08 10:44 UTCGHSA enrichment
  68. 2026-09-08 06:54 UTCGHSA enrichment
  69. 2026-09-08 03:07 UTCGHSA enrichment
  70. 2026-09-07 23:20 UTCGHSA enrichment
  71. 2026-09-07 19:33 UTCEG score recompute
  72. 2026-09-07 19:33 UTCGHSA enrichment
  73. 2026-09-07 15:46 UTCGHSA enrichment
  74. 2026-09-07 11:59 UTCGHSA enrichment
  75. 2026-09-07 08:12 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-85430?
CVE-2026-85430 is a critical vulnerability published on September 3, 2026. MOOS essential-moos through 10.0.1 contains an authentication bypass vulnerability in pShare that accepts UDP datagrams from any source and republishes them with the attacker-claimed identity intact. Attackers can send crafted UDP datagrams to pShare input routes to inject messages into the local…
When was CVE-2026-85430 disclosed?
CVE-2026-85430 was first published in the National Vulnerability Database on September 3, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-85430 actively exploited?
CVE-2026-85430 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 40.2% of all scored CVEs.
What is the CVSS score of CVE-2026-85430?
CVE-2026-85430 has a CVSS v3 base score of 9.1 (NVD).
How do I remediate CVE-2026-85430?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-85430, 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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