---
id: 4320
title: "Bypassing debug password protection on the RH850 family using fault injection"
source_domain: blog.quarkslab.com
source_url: "https://blog.quarkslab.com/bypassing-debug-password-protection-on-the-rh850-family-using-fault-injection.html"
published_at: "2026-03-04 23:00"
tags: ["hardware-security", "fault-injection", "hardware", "automotive", "rh850", "renesas", "glitching"]
phying_url: "https://phying.com/item/4320"
lang: en
---

# Bypassing debug password protection on the RH850 family using fault injection

## Summary

Quarkslab bypasses the 16-byte IDCODE debug password on several Renesas RH850 automotive microcontroller variants using voltage fault injection, enabling firmware extraction in black-box audits.

## Intelligence Metadata

- **Sources:** blog.quarkslab.com
- **Published:** 2026-03-04 23:00
- **Original:** https://blog.quarkslab.com/bypassing-debug-password-protection-on-the-rh850-family-using-fault-injection.html
- **Phying News:** https://phying.com/item/4320