On May 14, 2026, Microsoft disclosed CVE-2026-42897, an Exchange Server Outlook Web Access vulnerability affecting on-premises Exchange Server 2016, Exchange Server 2019, and Exchange Server Subscription Edition, with mitigation available immediately through Exchange Emergency Mitigation Service...
Microsoft has disclosed CVE-2026-42897 as a Microsoft Exchange Server spoofing vulnerability in the May 2026 security cycle, with the advisory pointing administrators to Exchange Server as the affected product family and framing the issue as a confirmed security flaw rather than a speculative...