CVE-2023-4818

Name: CVE-2023-4818
Creator: NVD / NIST
Published: 2024-01-15T14:15:25.18+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.6/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-4818 is a high-severity vulnerability rated 7.6/10 on the CVSS scale. 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.. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.6/10

CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

EPSS Probability

0.66%

47.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Paxtechnology	Paydroid	7.1.2_aquarius_11.1.50_20230614

References

https://blog.stmcyber.com/pax-pos-cves-2023/Exploit, Third Party Advisory
https://cert.pl/en/posts/2024/01/CVE-2023-4818/Third Party Advisory
https://cert.pl/posts/2024/01/CVE-2023-4818/Third Party Advisory
https://ppn.paxengine.com/release/developmentPermissions Required
https://blog.stmcyber.com/pax-pos-cves-2023/Exploit, Third Party Advisory
https://cert.pl/en/posts/2024/01/CVE-2023-4818/Third Party Advisory
https://cert.pl/posts/2024/01/CVE-2023-4818/Third Party Advisory
https://ppn.paxengine.com/release/developmentPermissions Required

Timeline

Published: Jan 15, 2024
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4818?

How severe is CVE-2023-4818?

CVE-2023-4818 has a CVSS score of 7.6/10 (HIGH severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4818?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-4818?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST