CVE-2026-21510
KEVMicrosoft Windows Shell Protection Mechanism Failure Vulnerability
View CVE record →- Vendor / Project
- Microsoft
- Product
- Windows
- Date added
- Feb 10, 2026
- Due date
- Mar 3, 2026
- Known ransomware use
- Unknown
- CWEs
- CWE-693
Description
Microsoft Windows Shell contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.