CVE-2026-55007

No fix known EPSS <1%CVSS 8.1

Double free in Microsoft Exchange Server allows an unauthorized attacker to execute code over a network.

Published 2026-09-08 · CVE record · OSV

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