CVE-2019-18671

Name: CVE-2019-18671
Creator: NVD / NIST
Published: 2019-12-06T18:15:12.653+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 3.27%

Last modified Jun 17, 2026

CVE-2019-18671 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 3.27% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.27%

86.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Keepkey	Keepkey Firmware	< 6.2.2

References

https://blog.inhq.net/posts/keepkey-CVE-2019-18671/
https://github.com/keepkey/keepkey-firmware/commit/b222c66cdd7c3203d917c80ba615082d309d80c3Patch, Third Party Advisory
https://medium.com/shapeshift-stories/keepkey-release-notes-v-6f7d2ec78065Release Notes, Third Party Advisory
https://medium.com/shapeshift-stories/shapeshift-security-update-8ec89bb1b4e3Third Party Advisory
https://blog.inhq.net/posts/keepkey-CVE-2019-18671/
https://github.com/keepkey/keepkey-firmware/commit/b222c66cdd7c3203d917c80ba615082d309d80c3Patch, Third Party Advisory
https://medium.com/shapeshift-stories/keepkey-release-notes-v-6f7d2ec78065Release Notes, Third Party Advisory
https://medium.com/shapeshift-stories/shapeshift-security-update-8ec89bb1b4e3Third Party Advisory

Timeline

Published: Dec 6, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2019-18671?

How severe is CVE-2019-18671?

CVE-2019-18671 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 3.27% probability of exploitation in the next 30 days.

How do I fix CVE-2019-18671?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-18671?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST