CVE-2019-18671
CVE-2019-18671 is a critical-severity vulnerability in Keepkey Keepkey Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 3% (87th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Keepkey Keepkey Firmware
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2019-18671?
- 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.
- How severe is CVE-2019-18671?
- CVE-2019-18671 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2019-18671 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2019-18671?
- CVE-2019-18671 affects Keepkey Keepkey Firmware. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2019-18671?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2019-18671 published?
- CVE-2019-18671 was published on 2019-12-06 and last updated on 2026-06-17.
References
- https://blog.inhq.net/posts/keepkey-CVE-2019-18671/
- https://github.com/keepkey/keepkey-firmware/commit/b222c66cdd7c3203d917c80ba615082d309d80c3
- https://medium.com/shapeshift-stories/keepkey-release-notes-v-6f7d2ec78065
- https://medium.com/shapeshift-stories/shapeshift-security-update-8ec89bb1b4e3
Affected products (1)
- cpe:2.3:o:keepkey:keepkey_firmware:*:*:*:*:*:*:*:*
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