---
id: CVE-2025-34503
title: >-
  Deck Mate 1 executes firmware directly from an external EEPROM without
  verifying authenticity or integrity
summary: >-
  Deck Mate 1 executes firmware directly from an external EEPROM without
  verifying authenticity or integrity. An attacker with physical access can
  replace or reflash the EEPROM to run arbitrary code that persists across
  reboots. Because th…
severity: none
cwe:
  - CWE-347
  - CWE-1326
published: '2025-10-24'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T11:10:00.250'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-34503'
references:
  - url: >-
      https://www.ioactive.com/wp-content/uploads/2025/05/IOActive-card-shuffler-security.pdf
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/shuffle-master-deck-mate-1-unauthenticated-eeprom-firmware-execution
    label: disclosure@vulncheck.com
tags:
  - nvd
epss: 0.00131
epssPercentile: 0.02301
ingestedAt: '2026-10-08T11:31:27.577Z'
---

## Overview

Deck Mate 1 executes firmware directly from an external EEPROM without verifying authenticity or integrity. An attacker with physical access can replace or reflash the EEPROM to run arbitrary code that persists across reboots. Because this design predates modern secure-boot or signed-update mechanisms, affected systems should be physically protected or retired from service. The vendor has not indicated that firmware updates are available for this legacy model.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.