CVE-2022-34303
Status: ModifiedMedium (6.7)—💥 PoC
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.
CVSS
- Version: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- Base score: 6.7
Exploitation probability (EPSS)
- Probability of exploitation in the next 30 days: 0.85%
- Percentile among all scored CVEs: 57
- Score date: 10/7/2026
EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).
💥 Public exploits
Exploit code or detection templates are publicly available. This is not the same as confirmed active exploitation (KEV), but it raises the risk: patch with priority.
- Proof of concept on GitHub (unverified) · List of proofs of concept on GitHub
⚠️ GitHub proofs of concept are not verified: some are fake or contain malware. Never run them outside an isolated lab.
Affected technologies (10)
CWEs
- NVD-CWE-noinfo
References
- https://edk2-docs.gitbook.io/understanding-the-uefi-secure-boot-chain/secure_boot_chain_in_uefi/uefi_secure_boot
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.html
- https://www.kb.cert.org/vuls/id/309662
- https://edk2-docs.gitbook.io/understanding-the-uefi-secure-boot-chain/secure_boot_chain_in_uefi/uefi_secure_boot
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-01001.html
- https://www.kb.cert.org/vuls/id/309662
Raw JSON (NVD)
Show
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