cve 2026 69414

CVE-2026-69414, also known as ShieldBreak, is a Microsoft Defender elevation-of-privilege vulnerability that Microsoft assigned but has not yet fixed or listed affected builds. The flaw is distinct from the earlier RoguePlanet patch bypass, as technical analysis indicates the exploits use different paths. Windows administrators should not assume that machines with July's Defender engine update for RoguePlanet are protected from ShieldBreak. Microsoft's Security Update Guide entry from August 14 identifies it as an elevation-of-privilege issue in the Microsoft Malware Protection Engine, but no security update or supported affected builds have been published, leaving Windows systems potentially exposed.