Microsoft February Patch Tuesday: fixed three zero-days (CVE-2023-21715, CVE-2023-23376, CVE-2023-21823) Vulnerability Microsoft February Patch Tuesday: fixed three zero-days (CVE-2023-21715, CVE-2023-23376, CVE-2023-21823) Do Son February 14, 2023 By executing a specially-crafted program, an authenticated attacker could exploit CVE-2023-21823 to gain SYSTEM privileges.