Microsoft Patch Tuesday for February 2026 — Snort rules and prominent vulnerabilities

Talos summarizes Microsoft’s February 2026 security update which discloses 59 vulnerabilities across products (including two Critical ACI Confidential Containers issues), several remote code execution and privilege escalation flaws (notably MSHTML CVE-2026-21513 with CVSS 8.8), and multiple vulnerabilities reported as actively exploited. Cisco Talos also released Snort/IDS rules to detect exploitation attempts and advises applying Microsoft’s updates and rule updates to mitigate risk.