cve 2026 21260

CVE-2026-21260 is a Microsoft Outlook spoofing vulnerability that requires immediate attention from administrators. Microsoft's guidance emphasizes installing all applicable security updates for Outlook and Office components, as multiple updates may be necessary to fully address the issue. The tag covers discussions about this specific vulnerability, including update deployment strategies and the importance of applying every listed patch. Administrators should review the Security Updates table for their software and install all offered updates to mitigate the spoofing risk.