CVE-2015-1635VulnerabilityPublished 02/10/2022Updated 10/24/2026

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

Affects Microsoft HTTP.sysSource CISA KEV

Severity

High

No CVSS score published yet

Exploitation: Actively exploited – in CISA KEV since 02/10/2022
KEV deadline: 08/10/2022
EPSS: 100.0% chance of exploitation in 30 days – higher than 99% of CVEs

What to do

CISA required action

Apply updates per vendor instructions.

nvd.nist.gov/vuln/detail/CVE-2015-1635 (opens in a new tab)

Description

CVE-2015-1635 is a high-severity vulnerability in the Microsoft HTTP protocol stack (HTTP.sys) that allows remote code execution. This vulnerability has been exploited in the wild. No specific affected versions or patch information is provided in the available data.

Summary

Microsoft HTTP.sys contains a remote code execution vulnerability identified as CVE-2015-1635. This flaw allows an attacker to execute arbitrary code remotely via crafted HTTP requests. The vulnerability is known to have been exploited in the wild, indicating active threat usage. No detailed version or patch information is provided in the source data.

Impact

Successful exploitation of this vulnerability allows remote attackers to execute arbitrary code on affected systems, potentially leading to full system compromise. The presence of known exploits in the wild increases the urgency of addressing this issue.

Mitigation

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch or official fix information is provided, users should consult Microsoft security advisories for updates and apply any available patches promptly.

Weaknesses

CWE-94Code Injection (opens in a new tab)

What to do

Description

AnalysisAI-generated, updated 10/24/2026, 10:10:58 UTC

Weaknesses

References

Related threats