# CVE-2025-34503: Shuffle Master Deck Mate 1 Unauthenticated EEPROM Firmware Execution

> Attackers with physical access can replace EEPROM firmware to execute arbitrary code on Deck Mate 1 shufflers, which lack secure boot and are end-of-life.

- **Severity:** High 7.0 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 24 Oct 2025
- **Updated:** 28 Jul 2026
- **Also known as:** GHSA-4v5m-7xcr-cg68

## What is CVE-2025-34503?

CVE-2025-34503 is a high-severity code injection vulnerability in Light & Wonder, Inc. / SHFL Entertainment, Inc. / Shuffle Master, Inc. Deck Mate 1, published on 24 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

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.

Weakness: CWE-347 (Improper Verification of Cryptographic Signature), CWE-1326 (Missing Immutable Root of Trust in Hardware)

## Which versions are affected by CVE-2025-34503?


## How do I fix CVE-2025-34503?

No fix has been published for CVE-2025-34503 yet. Limit exposure of the affected software until one is available.

## Is CVE-2025-34503 being exploited?

There is no known exploitation of CVE-2025-34503 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2025-34503 and fix it if it is affected.

What it is: CVE-2025-34503 is a high-severity code injection vulnerability in Light & Wonder, Inc. / SHFL Entertainment, Inc. / Shuffle Master, Inc. Deck Mate 1, published on 24 Oct 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2025-34503 in the wild and no public exploit code.

Affected product: Light & Wonder, Inc. / SHFL Entertainment, Inc. / Shuffle Master, Inc. Deck Mate 1. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2025-34503/ (Markdown: https://insights.sbomify.com/CVE-2025-34503/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2025-34503
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2025-34503
- OSV: https://osv.dev/vulnerability/CVE-2025-34503

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From sbomify Insights: https://insights.sbomify.com/CVE-2025-34503/
Summaries are generated and may contain mistakes; the official description above is the record.