NCC Group has found a flaw during the annual internal penetration test ordered by Axis Communications. The protection for device tampering (commonly known as Secure Boot) contains a flaw which provides an opportunity for a sophisticated attack to bypass this protection. Axis has released patched AXIS OS versions for the highlighted flaw. Please refer to the Axis security advisory for more information and solution.
https://www.axis.com/dam/public/45/3c/a1/cve-2023-21414pdf-en-US-412758.pdf