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TI-2025-14269 Aliases CVE-2025-15645GHSA-jj3m-33jh-v459

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

Priority LOW 23CWE-1284Published · Updated

Key facts

Attack vector
Physical
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0021 11th percentileScored 2026-11-07
Fix Fixed Ledger Nano X (Ledger): 2.4.2Ledger Flex (Ledger): 1.2.2+1 more product

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LedgerLedger Nano Xbefore 2.4.22.4.2Patch availableCNA
LedgerLedger Flexbefore 1.2.21.2.2Patch availableCNA
LedgerLedger Staxbefore 1.6.21.6.2Patch availableCNA
  • Ledger Nano X VendorLedger Affected before 2.4.2 Fixed in 2.4.2 Patch available CNA
  • Ledger Flex VendorLedger Affected before 1.2.2 Fixed in 1.2.2 Patch available CNA
  • Ledger Stax VendorLedger Affected before 1.6.2 Fixed in 1.6.2 Patch available CNA

Remediation

  • Fix · CNA Ledger Nano X (Ledger) Fixed in 2.4.2
  • Fix · CNA Ledger Flex (Ledger) Fixed in 1.2.2
  • Fix · CNA Ledger Stax (Ledger) Fixed in 1.6.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-15645
  2. 2026-10-03 Alias added: GHSA-jj3m-33jh-v459

References

Advisory 1

  • TI-2017-02028 Memory corruption in Ledger CLI CVSS 3.0HIGH 7.8
  • TI-2017-02029 Use after free in Ledger CLI CVSS 3.0HIGH 7.8
  • TI-2020-09753 Ledger Live before 2.7.0 does not handle Bitcoin's Replace-By-Fee (RBF). CVSS 3.1HIGH 8.1
  • TI-2023-06709 Ledger Live hw-app-eth EIP-712 Message Parsing Integer Truncation CVSS 4.0MEDIUM 6.9
  • TI-2020-05566 A flawed protocol design in the Ledger Monero app before 1.5.1 for Ledger Nano and Ledger… CVSS 3.1MEDIUM 5.5
  • TI-2023-06710 Ledger Bitcoin App 2.1.0 Address Derivation Error via Miniscript CVSS 4.0MEDIUM 4.1
See all 7 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences