Microsoft Windows: Shell Protection Mechanism Failure Vulnerability
What to do: Run Windows Update and restart the PC.
- Affects
- Microsoft Windows
- Identifier
- CVE-2026-21510
- What it is
- Microsoft Windows Shell contains a protection mechanism failure vulnerability that could allow an unauthorized attacker to bypass a security feature over a network.
- Official guidance
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.