CVE-2026-85455

HIGHPre-NVD 8.28.2—
EchelonGraph scoreMEDIUM confidence

Score 8.2 from GitHub Security Advisory (severity: HIGH) published 2026-09-04. A secondary CVSS source baseline 8.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this weekElevated
8.2EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 8.2Exploit: Elevated riskExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

MOOS core-moos through 10.4.0 contains a buffer over-read vulnerability in CMOOSCommPkt where a four-byte packet triggers out-of-bounds memory access during deserialization. Attackers can open a TCP connection to the MOOSDB port and send a crafted short packet to read memory before authentication.

CVSS v3
8.2
EG Score
8.2HIGHmedium confidence
EG Risk
53
EG Risk 53/100CISA SSVC

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
Severity82% × 45%
Exploitation40% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.7%
EPSS %ILE
50th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 3, 2026

Last Modified

September 8, 2026

Advisory Details (5)

Auto-updated Sep 3, 2026
Upstream fix merged — awaiting tagged release. Sources: github_pr, github_commit.
generic

MOOS core-moos through 10.4.0 MOOSDB Out-of-Bounds Read via Short Packet | Advisories | VulnCheck

https://www.vulncheck.com/advisories/moos-core-moos-through-10.4.0-moosdb-out-of-bounds-read-via-short-packet
generic

core-moos/Core/libMOOS/Comms/MOOSCommPkt.cpp at ec9c77c68fcbdef8f5e4c60fe243acd223433f0c · themoos/core-moos · GitHub

https://github.com/themoos/core-moos/blob/ec9c77c68fcbdef8f5e4c60fe243acd223433f0c/Core/libMOOS/Comms/MOOSCommPkt.cpp#L228
generic

GitHub - themoos/core-moos: A very light weight, easy to use middleware. You will need core-moos above all other components · GitHub

https://github.com/themoos/core-moos
github_commit

commit d30c14585753 (themoos/core-moos)

Fix landed in themoos/core-moos commit d30c14585753 — awaiting tagged release

https://github.com/themoos/core-moos/commit/d30c14585753f9ae39749d9628ed15c8383f0568
github_pr

Reject packets shorter than the fixed header in CMOOSCommPkt

Upstream fix in progress (PR #75 · themoos/core-moos, state=open)

https://github.com/themoos/core-moos/pull/75

Vendor Advisories for CVE-2026-85455(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 24× in last 7d / 110× 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 138 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-85455?
CVE-2026-85455 is a high vulnerability published on September 3, 2026. MOOS core-moos through 10.4.0 contains a buffer over-read vulnerability in CMOOSCommPkt where a four-byte packet triggers out-of-bounds memory access during deserialization. Attackers can open a TCP connection to the MOOSDB port and send a crafted short packet to read memory before authentication.
When was CVE-2026-85455 disclosed?
CVE-2026-85455 was first published 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-2026-85455 actively exploited?
CVE-2026-85455 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (50th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-85455?
CVE-2026-85455 has a CVSS base score of 8.2 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-85455?
An upstream fix for CVE-2026-85455 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-85455 are linked in the Vendor Advisories panel on this page.

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