HOMEVULNERABILITIESCVE-2023-27892
MEDIUM

CVE-2023-27892

CWE-125Published: May 2, 2023· Updated: Jun 17, 2026

5.7
CVSS v3.1

Official Description

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.

NVD Source

Technical Analysis

CVE-2023-27892 requires local access, meaning attackers must already have a foothold on the target system.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), availability disruption (denial of service), with a CVSS base score of 5.7.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorPhysical
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:P/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected Vendors & Products

shapeshift2 product(s)
keepkey firmwarekeepkey
Source: NVD CPE · 2 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
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Official Patches & Advisories

PATCHhttps://github.com/keepkey/keepkey-firmware/pull/337
PATCHhttps://github.com/keepkey/keepkey-firmware/pull/337
ADVISORYhttps://blog.inhq.net/posts/keepkey-CVE-2023-27892/
ADVISORYhttps://blog.inhq.net/posts/keepkey-CVE-2023-27892/

All References (4)

→
https://blog.inhq.net/posts/keepkey-CVE-2023-27892/Exploit · Third Party Advisory
→
https://github.com/keepkey/keepkey-firmware/pull/337Patch
→
https://blog.inhq.net/posts/keepkey-CVE-2023-27892/Exploit · Third Party Advisory
→
https://github.com/keepkey/keepkey-firmware/pull/337Patch

Quick Facts

CVE IDCVE-2023-27892
CVSS Score5.7 / 10
SeverityMEDIUM
WeaknessCWE-125
CISA KEVNo
Affected1 vendor(s)
PublishedMay 2, 2023

Related CVEs (CWE-125)

CVE-2009-2523
10.0
CVE-2021-41556
10.0
CVE-2026-24826
10.0
CVE-2021-21777
10.0
CVE-2013-0767
10.0
CVE-2017-14451
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2023-27892 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.
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