CVE-2015-1635
Microsoft HTTP.sys Remote Code Execution Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 10 August 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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."
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 100.00% probability · 100th percentile
- Public exploits
- 2 in Exploit-DB · first 15 April 2015
- CISA KEV
- Listed 10 February 2022 · due 10 August 2022
- Weakness
- CWE-94
- Affected
- microsoft/windows 7 · microsoft/windows 8 · microsoft/windows 8.1 · microsoft/windows server 2008 · microsoft/windows server 2012
- Source
- secure@microsoft.com
EPSS 100.0% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2015-1635
Public exploits (2)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.htmlExploit, Third Party Advisory, VDB Entry
- http://www.osvdb.org/120629Broken Link
- http://www.securityfocus.com/bid/74013Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1032109Broken Link, Third Party Advisory, VDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/36773/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/36776/Exploit, Third Party Advisory, VDB Entry
- http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.htmlExploit, Third Party Advisory, VDB Entry
- http://www.osvdb.org/120629Broken Link
- http://www.securityfocus.com/bid/74013Broken Link, Third Party Advisory, VDB Entry
- http://www.securitytracker.com/id/1032109Broken Link, Third Party Advisory, VDB Entry
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034Patch, Vendor Advisory
- https://www.exploit-db.com/exploits/36773/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/36776/Exploit, Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1635US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.