CVE-2026-20929: Windows HTTP.sys Elevation of Privilege Vulnerability
Improper access control in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.
Other sources
Windows HTTP.sys Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.0.6003.23717Patch KB5073700 - Upgrade
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Fixed in 6.1.7601.28117Patch KB5073699 - Upgrade
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Fixed in 6.2.9200.25868Patch KB5073698 - Upgrade
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Fixed in 6.3.9600.22968Patch KB5073696 - Upgrade
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Fixed in 10.0.25398.2092Patch KB5073450 - Upgrade
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Fixed in 10.0.14393.8783Patch KB5073722 - Upgrade
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Fixed in 10.0.22631.6491Patch KB5073455 - Upgrade
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Fixed in 10.0.19045.6809Patch KB5073724 - Upgrade
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Fixed in 10.0.19044.6809Patch KB5073724 - Upgrade
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Fixed in 10.0.17763.8276Patch KB5073723 - Upgrade
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Fixed in 10.0.20348.4648Patch KB5073457
Event History
Frequently Asked Questions
What is the severity of CVE-2026-20929?
CVE-2026-20929 has a severity rating that indicates a significant risk due to improper access control allowing privilege escalation.
How do I fix CVE-2026-20929?
To fix CVE-2026-20929, apply the necessary patches provided by Microsoft for the affected Windows Server versions.
Who is affected by CVE-2026-20929?
CVE-2026-20929 affects multiple versions of Microsoft Windows Server, including 2012, 2008, and 2016, among others.
What types of systems are vulnerable to CVE-2026-20929?
CVE-2026-20929 primarily impacts Windows Server installations, particularly Server Core configurations.
Can an attacker exploit CVE-2026-20929 remotely?
Yes, an authorized attacker can potentially exploit CVE-2026-20929 over a network to elevate privileges.