CVE-2026-21510Windows Shell Security Feature Bypass Vulnerability

In plain English

A high-severity security flaw in Windows 10 Version 1607 from Microsoft. Attackers are actively exploiting it in the wild (listed by CISA on February 10, 2026). The chance it is exploited in the next 30 days is estimated at 61.2% (higher than 99.2% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.