BitUnlocker

BitUnlocker Downgrade Attack A proof of concept for accessing BitLocker-encrypted disks in under 5 minutes on fully patched Windows 11 machines through a boot manager downgrade attack, leveraging the SDI vulnerability originally documented as CVE-2025-48804. The July 2025 patch fixes this in...

secureboot_objects

Secure Boot Objects This repository is used to hold the secure boot objects recommended by Microsoft. For documentation visit our Wiki! Versioning This repository follows semantic versioning .., which is a versioning scheme that conveys meaning about the underlying changes. Version Components Maj...

shim-review

This repo is for review of requests for signing shim. To create a request for review: clone this repo preferably fork it edit the template below add the shim.efi to be signed add build logs add any additional binaries/certificates/SHA256 hashes that may be needed commit all of that tag it with a...

EUVD-2026-91376

A local attacker with control over GRUB's configuration can bypass lockdown restrictions when booting with Secure Boot and load an unsigned GRUB module, while GRUB continues to report lockdown is enabled. The vulnerability is caused by insufficient validation of the MMIO base address passed to th...

shim

shim, a first-stage UEFI bootloader shim is a trivial EFI application that, when run, attempts to open and execute another application. It will initially attempt to do this via the standard EFI LoadImage and StartImage calls. If these fail because Secure Boot is enabled and the binary is not sign...

CVE-2025-3052

🐞 CVE-2025-3052: IhisiParamBuffer Memory Corruption This repository centralizes research material related to CVE-2025-3052, a memory corruption vulnerability in a UEFI module signed with Microsoft's third-party certificate that allows an attacker to corrupt security-critical firmware structures,...

CVE-2025-4275

🐞 CVE-2025-4275: Hydroph0bia SecureFlash Certificate Shadowing This repository contains research material related to CVE-2025-4275, a Secure Boot bypass vulnerability affecting UEFI-compatible firmware based on Insyde H2O. It centralizes technical analysis of the vulnerability, the binaries...

incus-os

Introduction IncusOS is an immutable OS image dedicated to running Incus. It's based on Debian 13 and built using mkosi. IncusOS can be installed on modern amd64 x8664 and arm64 systems. This aims at providing a very fast, safe and reliable way to run an Incus server. It's got a strong focus on...

test_avb_key

On Almost Signing Android Builds Introduction An error sometimes encountered by NCC Group consultants is signing Android builds with known private keys. This leaves the device manufacturers and in turn their users vulnerable, even on devices where secure boot is enabled. This blog post has two...

shim

shim, un cargador de arranque UEFI de primera etapa shim es una aplicación EFI trivial que, al ejecutarse, intenta abrir y ejecutar otra aplicación. Inicialmente intentará hacerlo mediante las llamadas estándar de EFI LoadImage y StartImage. Si estas fallan porque Secure Boot está habilitado y el...

CVE-2026-79298

🐞 CVE-2026-79298: Remediación Incompleta del Bypass de UEFI Secure Boot en Howyar SysReturn Se parcheó una vulnerabilidad. Se revocó un binario. Pero solo se corrigió la mitad de la arquitectura. Dieciocho meses después, la ruta de arranque IA-32 seguía llevando el mismo cargador PE personalizado...

edk2

============== EDK II Project A modern, feature-rich, cross-platform firmware development environment for the UEFI and PI specifications from www.uefi.org. .. image::...

CVE-2021-3972

CVE-2021-3972 código de prueba sin nada más BYTE value = 0x1; SetFirmwareEnvironmentVariableExT"ChgBootSecureBootDisable",T"6ACCE65D-DA35-4B39-B64B-5ED927A7DC7E",&value,sizeofBYTE,0x7;...

secure-boot-cert-servicing

Secure Boot Certificate Rollover — assessment and servicing A single, self-contained PowerShell script that assesses a Windows machine's Secure Boot certificate posture for the 2011 → 2023 rollover CVE-2023-24932 / KB5025885 and, only when you explicitly ask it to, opts that machine in to the...

CVE-2026-8863

CVE-2026-8863 Collection of the signed UEFI Secure Boot shim binaries affected by CVE-2026-8863, with the embedded shim version, Authenticode signer and revocation hashes of each image. Releases that ship the byte-identical signed shim are collapsed onto a single row — one Authenticode hash is on...

Orchestrated-Powershell-for-CVE-2023-24932-en

Secure Boot Mitigation Orchestrator Script Overview This PowerShell script automates the Secure Boot mitigation steps for CVE-2023-24932 , as outlined in the Microsoft Security Guidance. It handles the entire process, including registry updates, reboots, and event log validation, to ensure your...

CVE-2025-0690

CVE-2025-0690: Integer Overflow Vulnerability in GRUB2 🛡️ Overview CVE-2025-0690 is a critical integer overflow vulnerability in the GRUB2 boot loader, allowing arbitrary code execution and Secure Boot bypass. This flaw affects systems that rely on GRUB2 for secure boot, exposing the system before...

dubiousdisk

dubious disk - the porygon-z that's super effective against secure boot! CVE-2022-30203, CVE-2023-21560, CVE-2023-28269, CVE-2023-28249, and more... Overly permissive code in the Windows boot environment allows for overwriting arbitrary memory, and therefore, arbitrary code execution. Exploitro...

initroot

initroot: Motorola Bootloader Kernel Cmdline Injection Secure Boot & Device Locking Bypass CVE-2016-10277 By Roee Hay / Aleph Research, HCL Technologies First stage exploit: Tethered jailbreak This exploit gains an ephemeral unrestricted root access on the device. For example, on cedric some...

CVE-2020-14372

CVE-2020-14372: Bypassing not so Secure Boot with one "simple trick" Vulnerability details One day I typed "help" into GRUB2's console and saw some really "fun" commands: readbyte ADDR: Read 8-bit value from ADDR writebyte ADDR VAL: Write 8-bit value VAL to ADDR I immediately thought I found the...