CVE-2021-45337

CVE-2021-45337 is a high-severity privilege escalation vulnerability affecting Avast Antivirus versions prior to 20.8. A local attacker with SYSTEM privileges can exploit a flaw in the Self-Defense driver by "hollowing" the wsc_proxy.exe process, potentially gaining elevated privileges and acquiring antimalware protection. The CVSS score of 8.8 indicates a high impact on confidentiality, integrity, and availability with low attack complexity. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.