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Microsoft Windows Mark of the Web MOTW Protection Mechanism Failure Vulnerability

Microsoft Windows Mark of the Web MOTW contains a protection mechanism failure vulnerability that allows an attacker to bypass MOTW-based defenses. This ca

Security · HIGH
Source: CISA Known Exploited VulnerabilitiesMay 2, 2026, 4:51 PMSecurityhigh

Full content

Microsoft Windows Mark of the Web (MOTW) contains a protection mechanism failure vulnerability that allows an attacker to bypass MOTW-based defenses. This can result in a limited loss of integrity and availability of security features such as Protected View in Microsoft Office, which rely on MOTW tagging.

Vendor: Microsoft

Product: Windows

Due date: 2024-10-01

Known ransomware use: Unknown

Why it matters

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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