Rule Update
26-021 (May 16, 2026)
DESCRIPTION
* indicates a new version of an existing rule
Deep Packet Inspection Rules:
Mail Server Common
1012562 - Microsoft Word Remote Code Execution Vulnerability (CVE-2026-40364)
Server CLDAP
1012563 - Windows Netlogon Remote Code Execution Vulnerability (CVE-2026-41089)
Web Server HTTPS
1012564 - Microsoft Exchange Server Cross-Site Scripting Vulnerability (CVE-2026-42897)
Integrity Monitoring Rules:
There are no new or updated Integrity Monitoring Rules in this Security Update.
Log Inspection Rules:
There are no new or updated Log Inspection Rules in this Security Update.
Deep Packet Inspection Rules:
Mail Server Common
1012562 - Microsoft Word Remote Code Execution Vulnerability (CVE-2026-40364)
Server CLDAP
1012563 - Windows Netlogon Remote Code Execution Vulnerability (CVE-2026-41089)
Web Server HTTPS
1012564 - Microsoft Exchange Server Cross-Site Scripting Vulnerability (CVE-2026-42897)
Integrity Monitoring Rules:
There are no new or updated Integrity Monitoring Rules in this Security Update.
Log Inspection Rules:
There are no new or updated Log Inspection Rules in this Security Update.
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