cve 2026 50658

The cve 2026 50658 tag covers guidance on a local privilege-escalation vulnerability affecting Microsoft Defender for Endpoint for Mac installations older than build 101.26042.0020. The reported issue is a time-of-check/time-of-use race condition that could allow an authenticated attacker to gain extensive control of an affected Mac. The available discussion focuses on updating Defender to build 101.26042.0020 or later and verifying installed versions across managed device fleets, rather than relying only on automatic-update policies. It also records Microsoft’s July 14, 2026 disclosure and a Microsoft CVSS 3.1 score of 7.0.