What’s Vulnerable › Vulnerabilities

CVE-2022-35748: HTTP.sys Denial of Service Vulnerability

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 47.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-05-31 · updated 2026-06-17

Description

HTTP.sys Denial of Service Vulnerability

Affected products

• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: all versions
• Microsoft Windows Server 2019: all versions
• Microsoft Windows Server 2022: all versions
• Microsoft Windows Server 20H2: all versions
• Microsoft Windows Server 2012: from 6.2.9200.0 before 6.2.9200.23817 — fixed in 6.2.9200.23817
• Microsoft Windows Server 2012 R2: from 6.3.9600.0 before 6.3.9600.20520 — fixed in 6.3.9600.20520
• Microsoft Windows Server 2016: from 10.0.14393.0 before 10.0.14393.5291 — fixed in 10.0.14393.5291
• Microsoft Windows Server 2019: from 10.0.17763.0 before 10.0.17763.3287 — fixed in 10.0.17763.3287
• Microsoft Windows Server 2022: from 10.0.20348.0 before 10.0.20348.887 — fixed in 10.0.20348.887
• Microsoft Windows Server version 20H2: from 10.0.0 before 10.0.19042.1889 — fixed in 10.0.19042.1889

How to fix

Upgrade to a fixed version: Microsoft Windows Server 2012 6.2.9200.23817; Microsoft Windows Server 2012 R2 6.3.9600.20520; Microsoft Windows Server 2016 10.0.14393.5291; Microsoft Windows Server 2019 10.0.17763.3287; Microsoft Windows Server 2022 10.0.20348.887; Microsoft Windows Server version 20H2 10.0.19042.1889. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-35748
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-35748

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