Various Lexmark products through 2022-04-27 allow an attacker who has already compromised an affected Lexmark device to maintain persistence across reboots.
https://www.lexmark.com/en_us/solutions/security/lexmark-security-advisories.html
https://support.lexmark.com/alerts/
https://publications.lexmark.com/publications/security-alerts/CVE-2022-29850.pdf