CVE-2026-47291: HTTP.sys Remote Code Execution Vulnerability
HTTP.sys Remote Code Execution Vulnerability
Other sources
Integer overflow or wraparound in Windows HTTP.sys allows an unauthorized attacker to execute code over a network.
— 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 10.0.28000.2269Patch KB5095051 - Upgrade
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Fixed in 10.0.14393.9234Patch KB5094122 - Upgrade
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Fixed in 6.3.9600.23228Patch KB5094041 - Upgrade
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Fixed in 6.2.9200.26132Patch KB5094042 - Upgrade
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Fixed in 10.0.26100.8655Patch KB5094126 - Upgrade
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Fixed in 10.0.26200.8655Patch KB5094126 - Upgrade
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Fixed in 10.0.26100.32995Patch KB5094125 - Upgrade
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Fixed in 10.0.19045.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.19044.7417Patch KB5094127 - Upgrade
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Fixed in 10.0.17763.8880Patch KB5094123 - Upgrade
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Fixed in 10.0.20348.5256Patch KB5094128 - Upgrade
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Fixed in 10.0.22631.7219Patch KB5093998
Event History
Frequently Asked Questions
What is the severity of CVE-2026-47291?
The severity of CVE-2026-47291 is critical with a score of 9.8.
How do I fix CVE-2026-47291?
To fix CVE-2026-47291, apply the latest security updates provided by Microsoft for your affected Windows version.
What type of vulnerability is CVE-2026-47291?
CVE-2026-47291 is an integer overflow vulnerability in the Windows HTTP.sys component.
What systems are affected by CVE-2026-47291?
CVE-2026-47291 affects Microsoft Windows 10, Windows 11, and various versions of Windows Server including 2012, 2016, 2019, 2022, and 2025.
What are the potential impacts of CVE-2026-47291?
CVE-2026-47291 can allow an unauthorized attacker to execute remote code over a network, compromising the system.