CVE-2025-15645 (GCVE-0-2025-15645)
Vulnerability from cvelistv5 – Published: 2026-05-19 21:41 – Updated: 2026-07-14 22:25
VLAI
EPSS
VEX
Title
Ledger Nano X, Flex, Stax MCU Firmware Update Denial of Service
Summary
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.
Severity
4.6 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-20 14:43 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://donjon.ledger.com/lsb/021/ | vendor-advisory |
| https://www.vulncheck.com/advisories/ledger-nano-… | third-party-advisory |
Impacted products
3 products
| Vendor | Product | Version | |
|---|---|---|---|
| Ledger | Ledger Nano X |
Affected:
0 , < 2.4.2
(custom)
|
|
| Ledger | Ledger Flex |
Affected:
0 , < 1.2.2
(custom)
|
|
| Ledger | Ledger Stax |
Affected:
0 , < 1.6.2
(custom)
|
Date Public
2025-05-19 22:00
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