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

> CVE-2015-1635: Microsoft HTTP.sys Remote Code Execution Vulnerability. CVSS 9.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2015-1635
Last updated: 2025-10-22T00:05:32Z

- Published: 2015-04-14 20:00 UTC · Updated: 2025-10-22 00:05 UTC · Assigner: microsoft
- CVSS: 9.8 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS: 100.0%, 100th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-02-10, federal due date 2022-08-10, ransomware use: Unknown

## Description

HTTP.sys in Microsoft Windows 7 SP1, Windows Server 2008 R2 SP1, Windows 8, Windows 8.1, and Windows Server 2012 Gold and R2 allows remote attackers to execute arbitrary code via crafted HTTP requests, aka "HTTP.sys Remote Code Execution Vulnerability."

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- Microsoft: HTTP.sys

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2015-1635)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2015-1635)
- [http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.html](http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.html)
- [https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034)
- [https://www.exploit-db.com/exploits/36773/](https://www.exploit-db.com/exploits/36773/)
- [https://www.exploit-db.com/exploits/36776/](https://www.exploit-db.com/exploits/36776/)
- [http://www.osvdb.org/120629](http://www.osvdb.org/120629)
- [http://www.securityfocus.com/bid/74013](http://www.securityfocus.com/bid/74013)
- [http://www.securitytracker.com/id/1032109](http://www.securitytracker.com/id/1032109)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2015-1635 · Markdown: https://rewindex.com/cve/CVE-2015-1635.md · JSON: https://rewindex.com/api/v1/cves/CVE-2015-1635 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:45:09.795Z