High severity8.8NVD Advisory· Published May 6, 2021· Updated Jun 17, 2026
CVE-2021-31616
CVE-2021-31616
Description
Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.1.0 allow a stack buffer overflow via crafted messages. The overflow in ethereum_extractThorchainSwapData() in ethereum.c can circumvent stack protections and lead to code execution. The vulnerable interface is reachable remotely over WebUSB.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
3cpe:2.3:o:shapeshift:keepkey_firmware:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:shapeshift:keepkey_firmware:*:*:*:*:*:*:*:*range: >=7.0.3,<7.1.0
- (no CPE)
- Range: <7.1.0
Patches
Vulnerability mechanics
References
4- github.com/keepkey/keepkey-firmware/commit/e49d45594002d4d3fbc1f03488e6dfc0a0a65836nvdPatchThird Party Advisory
- blog.inhq.net/posts/keepkey-CVE-2021-31616/nvdExploitPatchThird Party Advisory
- github.com/keepkey/keepkey-firmware/releases/tag/v7.1.0nvdRelease NotesThird Party Advisory
- shapeshift.com/library/keepkey-important-update-issued-april-4-requirednvdVendor Advisory
News mentions
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