Rule Category

OS-WINDOWS -- Snort has detected traffic targeting vulnerabilities in a Windows-based operating system. This does not include browser traffic or other software on the OS, but attacks against the OS itself. (such as?)

Alert Message

OS-WINDOWS Microsoft Windows Server HTTP.sys memory corruption attempt

Rule Explanation

This rule looks for traffic that contains HTTP header patterns known to exploit a memory corruption vulnerability in the HTTP.sys component of Microsoft Windows Server.

What To Look For

This rule alerts on attempts to exploit a memory corruption vulnerability in the HTTP.sys component of Microsoft Windows Server.

Known Usage

No public information

False Positives

No known false positives

Contributors

Cisco Talos Intelligence Group

Rule Groups

MITRE::ATT&CK Framework::Enterprise::Initial Access::Exploit Public-Facing Application

Rule Categories::Server::Microsoft IIS

MITRE::ATT&CK Framework::Enterprise::Impact::Endpoint Denial of Service::Application or System Exploitation

CVE

Additional Links

Rule Vulnerability

Memory Corruption

Memory Corruption is any vulnerability that allows the modification of the content of memory locations in a way not intended by the developer. Memory corruption results are inconsistent; they could lead to fatal errors and system crashes or data leakage; some have no effect at all.

CVE Additional Information

This product uses data from the NVD API but is not endorsed or certified by the NVD.
CVE-2026-47291
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