Microsoft Exchange Zero-Day Under Attack, No Patch Available Von Darkreading 18. Mai 2026 security ORIGINAL QUELLE:darkreading.com Quelle: Darkreading CVE-2026-Adresse geschuetzt(XSS) vulnerability and can allow an attacker to compromise Outlook Web Access (OWA) mailboxes. Tags: change, cve-2026-21262, microsoft, seems, zero-day