A vulnerability in the SonicWall Email Security version 10.0.9.x allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host.
https://www.tenable.com/blog/aa23-215a-2022s-top-routinely-exploited-vulnerabilities
https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-215a
https://www.tenable.com/cyber-exposure/2021-threat-landscape-retrospective
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0007