CVE-2021-20023

SonicWall Email Security contains a path traversal vulnerability that allows a post-authenticated attacker to read files on the remote host. This vulnerability has known usage in a SonicWall Email Security exploit chain along with CVE-2021-20021 and CVE-2021-20022 to achieve privilege escalation. Vendor/Product: SonicWall SonicWall Email Security. Added to CISA KEV 2021-11-03; required action: Apply updates per vendor instructions.