Microsoft Exchange Server Vulnerability Actively Exploited, in a Bad Week for Microsoft

Forbes describes it as "definitely already out there, and under active exploitation according to the U.S. Cybersecurity and Infrastructure Security Agency, urging all organizations to prioritize timely remediation as the attack vector poses a significant risk." "We have issued CVE-2026-42897 to address a spoofing vulnerability affecting Exchange Outlook Web Access (OWA)," Microsoft told SecurityWeek. "We recommend customers enable EEMS to be better protected, and to follow our guidance availab