CVE-2023-27892: Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buff

Q: How do I fix CVE-2023-27892?

keepkey firmware: upgrade to 7.7.0. Exact commands for each OS are on this page.

Q: Is CVE-2023-27892 being exploited?

CVE-2023-27892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2023-27892 affect?

CVE-2023-27892 affects keepkey firmware. Severity is low (CVSS 3.8). Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buffer overflow via crafted messages. Flaws in cf_confirmExecTx() in ethereum_contracts.c can be used to reveal arbitrary microcontrol

Q: How urgent is CVE-2023-27892?

Priority 28/100. Public exploit reference

Routine

LOW 3.8UPGRADE

CVE-2023-27892 is a low-severity flaw (CVSS 3.8) affecting keepkey firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buffer overflow via crafted messages. Flaws in cf_confirmExecTx() in ethereum_contracts.c can be used to reveal arbitrary microcontroller memory on the device screen or crash the device. With physical access to a PIN-unlocked device, attackers can extract the BIP39 mnemonic secret from the hardware wallet.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	3.8 (Low)
Attack vector	Physical
Attack complexity	High
Privileges needed	High
User interaction	None
EPSS exploit chance	0.5% (top 59%)
CISA exploited list	No
Weakness	CWE-125, CWE-120
Published	2023-05-02
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: shapeshift

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-05-02 21:15 UTCPublished CVE record published
2026-06-17 05:46 UTCUpdated Record last modified

shapeshift keepkey firmware UPGRADE

Affected: >= 7.5.2 and < 7.7.0

Fixed in: 7.7.0

Safe to downgrade to: a release before 7.5.2

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-27892?

keepkey firmware: upgrade to 7.7.0. Exact commands for each OS are on this page.

Is CVE-2023-27892 being exploited?

CVE-2023-27892 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-27892 affect?

CVE-2023-27892 affects keepkey firmware. Severity is low (CVSS 3.8). Insufficient length checks in the ShapeShift KeepKey hardware wallet firmware before 7.7.0 allow a global buffer overflow via crafted messages. Flaws in cf_confirmExecTx() in ethereum_contracts.c can be used to reveal arbitrary microcontrol

How urgent is CVE-2023-27892?

Priority 28/100. Public exploit reference

References

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