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Actively Exploited Vulnerabilities

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CVE-2026-21510

Microsoft | WindowsAdded 2026-02-10Remediation Deadline 2026-03-03

Microsoft Windows Shell Protection Mechanism Failure Vulnerability

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.

Weakness Classification

CWE-693

References