CVE-2023-4818

HIGH 7.6EPSS 0.7%

PAX A920 device allows to downgrade bootloader due to a bug in its version check. The signature is correctly checked and only bootloader signed by PAX can be used. The attacker must have physical USB access to the device in order to exploit this vulnerability.

CVSS v3.1: 7.6 HIGHCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v3.1: 7.6 HIGHCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS: 0.66% chance of exploitation in the next 30 days, 49th percentile
Published: 2024-01-15
Updated: 2025-06-17

Proof-of-concept exploits (1)

https://blog.stmcyber.com/pax-pos-cves-2023/

References

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