CVE-2015-1635
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…
- 9.8CriticalCVSS base score
- 100.0%Exploitation in 30 daysEPSS · top 0.1% of all CVEs
- YesKnown exploitedin CISA's KEV since 10 Feb 2022
- 5Public exploitsMetasploit, Nuclei and Exploit-DB
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."
Exploited in the wild
CISA lists this vulnerability in its Known Exploited Vulnerabilities catalog as Microsoft HTTP.sys Remote Code Execution Vulnerability.
- Added
- 10 Feb 2022
- Fix due (US federal)
- 10 Aug 2022
- Used by ransomware
- Not known
Apply updates per vendor instructions.
ENISA's EU Vulnerability Database lists it as exploited, from CISA's KEV, since 10 Feb 2022.
Public exploit
An exploit or proof of concept is public: anyone can try it against an unpatched system. The public collections list 2 Metasploit modules, a Nuclei template and 2 Exploit-DB entries for it. 2 references of the record are tagged as an exploit. CISA's SSVC rates its exploitation: it is being exploited.
Show the exploits7
Metasploit modules2 modules
- MS15-034 HTTP Protocol Stack Request Handling Denial-of-Service (Metasploit module) (opens in a new tab)
auxiliary/dos/http/ms15_034_ulonglongaddRank normal
- MS15-034 HTTP Protocol Stack Request Handling HTTP.SYS Memory Information Disclosure (Metasploit module) (opens in a new tab)
auxiliary/scanner/http/ms15_034_http_sys_memory_dumpRank normal
Nuclei templates1 template
- Microsoft Windows 'HTTP.sys' - Remote Code Execution (Nuclei template) (opens in a new tab)
http/cves/2015/CVE-2015-1635.yamlSeverity critical
Exploit-DB2 entries
- Microsoft Windows - 'HTTP.sys' HTTP Request Parsing Denial of Service (MS15-034) (Exploit-DB entry) (opens in a new tab)
EDB-ID 36776dos, windowspublished 16 Apr 2015Not verified
- Microsoft Windows - 'HTTP.sys' (PoC) (MS15-034) (Exploit-DB entry) (opens in a new tab)
EDB-ID 36773dos, windowspublished 15 Apr 2015Not verified
References tagged exploit2 references
- 36773 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 36776 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
Modules, templates and exploits as listed by the Metasploit Framework (BSD-3-Clause), ProjectDiscovery's Nuclei templates (MIT) and the Exploit Database (GPLv2), read once a day. Where the data comes from
Timeline
ID reserved
By microsoft
- 56 days later
· 56 days later
Published
- 7 years later
· 7 years later
Added to CISA KEV
Known exploited in the wild
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 100.0% · top 0.1% of all CVEs (9 Nov 2026)
- CISA SSVC
- Exploitation: active · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
n/a
- affected n/a
References
8
- MS15-034 (opens in a new tab)vendor-advisoryx_refsource_MSx_transferred
- 36773 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- 120629 (opens in a new tab)vdb-entryx_refsource_OSVDBx_transferred
- 1032109 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- 74013 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- 36776 (opens in a new tab)exploitx_refsource_EXPLOIT-DBx_transferred
- http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.html (opens in a new tab)x_refsource_MISCx_transferred
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1635 (opens in a new tab)government-resource
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- CISA KEV catalog (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2015-1765 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2015-1635)Record last updated .