CVE-2019-18671: Keepkey Firmware

Critical severity, CVSS 9.8. EPSS: 3.3% chance of exploitation in the next 30 days.

Insufficient checks in the USB packet handling of the ShapeShift KeepKey hardware wallet before firmware 6.2.2 allow out-of-bounds writes in the .bss segment via crafted messages. The vulnerability could allow code execution or other forms of impact. It can be triggered by unauthenticated attackers and the interface is reachable via WebUSB.

Affected products

• Keepkey Keepkey Firmware: before 6.2.2 (fixed in 6.2.2)

Published 2019-12-06. Last modified 2026-06-17.