CVE-2021-20021

SonicWall Email Security contains an improper privilege management vulnerability that allows an attacker to create an administrative account by sending a crafted HTTP request to the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20022 and CVE-2021-20023 to achieve privilege escalation. Vendor/Product: SonicWall SonicWall Email Security. Added to CISA KEV 2021-11-03; required action: Apply updates per vendor instructions.