CVE-2015-1635HTTP.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 request…
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It affects microsoft windows_7 and 4 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Feb 10, 2022; federal agencies had to remediate by Aug 10, 2022. Treat that date as your deadline.
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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
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-94
- Known exploited
- Added to CISA KEV Feb 10, 2022; federal remediation due Aug 10, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 100.00% (percentile 100)
- Assigned by
- microsoft
- NVD analysis
- Analyzed
- Record last updated
- Oct 22, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
microsoft windows_7 microsoft:windows_7 | all versions | NVD |
microsoft windows_8 microsoft:windows_8 | all versions | NVD |
microsoft windows_8.1 microsoft:windows_8.1 | all versions | NVD |
microsoft windows_server_2008 microsoft:windows_server_2008 | r2; r2 | NVD |
microsoft windows_server_2012 microsoft:windows_server_2012 | all versions; r2 | NVD |
References
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2015/ms15-034vendor-advisory, x-refsource-ms, patch
- https://www.exploit-db.com/exploits/36773/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- http://www.osvdb.org/120629vdb-entry, x-refsource-osvdb, broken-link
- http://www.securitytracker.com/id/1032109vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
- http://www.securityfocus.com/bid/74013vdb-entry, x-refsource-bid, broken-link, third-party-advisory
- https://www.exploit-db.com/exploits/36776/exploit, x-refsource-exploit-db, third-party-advisory, vdb-entry
- http://packetstormsecurity.com/files/131463/Microsoft-Windows-HTTP.sys-Proof-Of-Concept.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2015-1635us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.