ACTIVELY EXPLOITED

CVE-2015-1635: Microsoft HTTP.sys Remote Code Execution Vulnerability

Facts
VendorMicrosoft
ProductHTTP.sys
Actively exploitedYes
Added to CISA KEV10 Feb 2022
CISA federal deadline10 Aug 2022
Weakness (CWE)CWE-94

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

Microsoft HTTP protocol stack (HTTP.sys) contains a vulnerability that allows for remote code execution.

SOURCES

Other Microsoft flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.