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CVE-2021-31616

HIGH
8.8
CVSS Score
Published: May 6, 2021 at 11:01 AM UTC
Updated: June 17, 2026 at 03:52 AM UTC
2 products affected across 1 vendorKeepkey FirmwareKeepkey

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Severity
HIGH8.8
Exploit prediction
EPSS 2%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Keepkey Firmware· Shapeshift
95%
7.0.3 ≤ v < 7.1.0
Affected range stops below 7.1.0, so it looks safe — our inference, not a vendor statement
shapeshift-keepkey (same device)
Keepkey· Shapeshiftdevice
80%
All versions

References (4)

x_refsource_MISCExploitPatchThird Party Advisory
Source: [email protected]
https://blog.inhq.net/posts/keepkey-CVE-2021-31616/
x_refsource_MISCPatchThird Party Advisory
Source: [email protected]
https://github.com/keepkey/keepkey-firmware/commit/e49d45594002d4d3fbc1f03488e6dfc0a0a65836
x_refsource_MISCRelease NotesThird Party Advisory
Source: [email protected]
https://github.com/keepkey/keepkey-firmware/releases/tag/v7.1.0
x_refsource_MISCVendor Advisory
Source: [email protected]
https://shapeshift.com/library/keepkey-important-update-issued-april-4-required

CVSS

8.8HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-787

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