Zero-Day Vulnerability 'RedSun' Affects Microsoft Defender

A zero-day vulnerability named RedSun affects Microsoft Defender, enabling attackers to escalate privileges to SYSTEM on fully updated Windows machines. The flaw was publicly disclosed by an unnamed security researcher, reportedly as an act of retaliation against Microsoft. No specific CVE ID, exploitation date, or affected versions were mentioned in the report. The vulnerability targets Microsoft Defender, though further technical details about the attack vector remain undisclosed. The disclosure appears motivated by personal grievances rather than coordinated vulnerability reporting.