CVE-2026-55006

No fix known EPSS <1%CVSS 7.8

Insufficient granularity of access control in Microsoft Exchange Server allows an authorized attacker to elevate privileges locally.

Published 2026-07-14 · CVE record · OSV

Products: Microsoft Exchange Server 2016 Cumulative Update 23, Microsoft Exchange Server 2019 Cumulative Update 14, Microsoft Exchange Server 2019 Cumulative Update 15, Microsoft Exchange Server Subscription Edition RTM