CVE-2026-37534

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-01. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, 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.

Integer underflow vulnerability in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b345bdfe (2025-11-30) in SAE_J1939_Read_Transport_Protocol_Data_Transfer,allows attackers to write to arbitrary memory via crafted sequence number from the CAN frame.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
34.0%
KEV
Not listed

Published

May 1, 2026

Last Modified

May 7, 2026

Advisory Details (2)

Auto-updated May 9, 2026
No patch confirmed yet.
generic

GitHub - DanielMartensson/Open-SAE-J1939: SAE J1939 protocol free to use for embedded systems or PC with CAN-bus · GitHub

https://github.com/DanielMartensson/Open-SAE-J1939
generic

Automotive CAN Protocol Libraries Multiple Buffer Overflows (CVE-2026-37534 through 37541, 42467-42469) · GitHub

https://gist.github.com/sgInnora/f4ac66faeefe07a653ceeb3f58cdc381

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 37× 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 166 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-37534?
CVE-2026-37534 is a critical vulnerability published on May 1, 2026. Integer underflow vulnerability in Open-SAE-J1939 thru commit b6caf884df46435e539b1ecbf92b6c29b345bdfe (2025-11-30) in SAEJ1939ReadTransportProtocolDataTransfer,allows attackers to write to arbitrary memory via crafted sequence number from the CAN frame.
When was CVE-2026-37534 disclosed?
CVE-2026-37534 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on May 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-37534 actively exploited?
CVE-2026-37534 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 34.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-37534?
CVE-2026-37534 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-37534?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-37534, 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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