CVE-2025-15645

MEDIUMNVD 4.64.6—
EchelonGraph scoreMEDIUM confidence

Score 4.6 from GitHub Security Advisory published 2026-05-20. NVD baseline CVSS 4.6; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.6
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 4.6Exploit: NoneExposed: 0

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

Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the reset_handler parameter during firmware flashing. An attacker can provide a crafted reset_handler address pointing to invalid memory or attacker-controlled code to cause the device to enter an unrecoverable fault state during boot, resulting in permanent loss of operability.

CVSS v3
4.6
EG Score
4.6(medium)
EPSS
11.3%
KEV
Not listed

Published

May 19, 2026

Last Modified

May 20, 2026

Advisory Details (2)

Auto-updated Jun 17, 2026
No patch confirmed yet.
generic

Ledger Nano X, Flex, Stax MCU Firmware Update Denial of Service | Advisories | VulnCheck

https://www.vulncheck.com/advisories/ledger-nano-x-flex-stax-mcu-firmware-update-denial-of-service
generic

Ledger Security Bulletin 021 | Ledger Donjon

https://donjon.ledger.com/lsb/021/

Vendor Advisories for CVE-2025-15645(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 9× in last 7d / 60× 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 134 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-15645?
CVE-2025-15645 is a medium vulnerability published on May 19, 2026. Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the resethandler parameter during firmware flashing. An attacker can provide a crafted resethandler address pointing to invalid memory or…
When was CVE-2025-15645 disclosed?
CVE-2025-15645 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on May 20, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-15645 actively exploited?
CVE-2025-15645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 11.3% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2025-15645?
CVE-2025-15645 has a CVSS v3 base score of 4.6 (NVD).
How do I remediate CVE-2025-15645?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-15645, 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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