CVE-2022-34303
A flaw was found in Eurosoft bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order...
- Published
- Aug 26, 2022
- Updated
- Aug 3, 2024
- Assigning CNA
- mitre
- Evidence observed
- Sep 11, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:HLow · next 30 days
- Percentile
- 56.1%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
A flaw was found in Eurosoft bootloaders before 2022-06-01. An attacker may use this bootloader to bypass or tamper with Secure Boot protections. In order to load and execute arbitrary code in the pre-boot stage, an attacker simply needs to replace the existing signed bootloader currently in use with this bootloader. Access to the EFI System Partition is required for booting using external media.
Sources
2Demonstrates CVE-2022-34303 Secure Boot bypass via CryptoPro signed UEFI Shell, using the mm command to nullify gSecurity2 and load unsigned UEFI applications.
Demonstrates CVE-2022-34302, a Secure Boot bypass via the New Horizon Datasys signed bootloader whose built-in custom PE/COFF loader executes unsigned UEFI applications.
Responsible use
Use vulnerability information only on systems you own or are authorized to test. Kitploit links to public research metadata and does not store exploit code or malicious payloads.