{"cve":"CVE-2023-4818","nvd":{"published":"2024-01-15T14:15:25.180","modified":"2026-06-17T06:38:40.570","status":"Modified","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. \n\n\n\n\nThe attacker must have physical USB access to the device in order to exploit this vulnerability.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":7.6},"cwes":["CWE-74"],"references":["https://blog.stmcyber.com/pax-pos-cves-2023/","https://cert.pl/en/posts/2024/01/CVE-2023-4818/","https://cert.pl/posts/2024/01/CVE-2023-4818/","https://ppn.paxengine.com/release/development","https://blog.stmcyber.com/pax-pos-cves-2023/"],"products":["paxtechnology:paydroid"],"source":"nvd","synced_at":"2026-10-19T21:43:38.875533635+00:00"},"epss":{"cve":"CVE-2023-4818","score":0.00663,"percentile":0.51729,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}