Email Security Microsoft Warns of Exchange Server Zero-Day Exploited in the Wild Microsoft has shared mitigations for CVE-2026-42897 until a permanent patch can be released for affected Exchange Server versions. Eduard KovacsMay 15, 2026
Vulnerabilities Organizations Warned of Vulnerability in Microsoft Exchange Hybrid Deployment CISA and Microsoft have issued advisories for CVE-2025-53786, a high-severity flaw allowing privilege escalation in cloud environments. Eduard KovacsAugust 7, 2025