EXECUTIVE SUMMARY:
CVE-2026-47291, with a CVSS score of 9.8, is a critical remote code execution (RCE) vulnerability in the Windows HTTP Protocol Stack. The flaw stems from an integer overflow or wraparound condition that can lead to memory corruption, allowing an unauthenticated attacker to execute arbitrary code remotely by sending specially crafted network requests to a vulnerable system. Because HTTP.sys operates at the kernel level and is widely used by Windows web services and applications, successful exploitation could result in complete system compromise without requiring user interaction. The vulnerability affects multiple supported Windows client and server versions, making internet-facing systems particularly exposed. Microsoft has released security updates to address the issue and recommends prompt patching to mitigate the risk of remote compromise.[/subscribe_to_unlock_form]
EXECUTIVE SUMMARY:
CVE-2026-47291, with a CVSS score of 9.8, is a critical remote code execution (RCE) vulnerability in the Windows HTTP Protocol Stack. The flaw stems from an integer overflow or wraparound condition that can lead to memory corruption, allowing an unauthenticated attacker to execute arbitrary code remotely by sending specially crafted network requests to a vulnerable system. Because HTTP.sys operates at the kernel level and is widely used by Windows web services and applications, successful exploitation could result in complete system compromise without requiring user interaction. The vulnerability affects multiple supported Windows client and server versions, making internet-facing systems particularly exposed. Microsoft has released security updates to address the issue and recommends prompt patching to mitigate the risk of remote compromise.[emaillocker id="1283"]
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REFERENCES:
The following reports contain further technical details:
https://securityonline.info/httpsys-rce-cve-2026-47291/
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