CRITICAL
CVE-2014-6321
CWE-94Published: November 11, 2014· Updated: Jun 17, 2026
10.0
CVSS v3.1
Official Description
Schannel in Microsoft Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8, Windows 8.1, Windows Server 2012 Gold and R2, and Windows RT Gold and 8.1 allows remote attackers to execute arbitrary code via crafted packets, aka "Microsoft Schannel Remote Code Execution Vulnerability."
Technical Analysis
CVE-2014-6321 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
Exploitation requires some privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.
User Interaction
Scope
Impact
ConfidentialityC
IntegrityC
AvailabilityC
AV:N/AC:L/Au:N/C:C/I:C/A:C
Affected Vendors & Products
Microsoft9 product(s)
windows 7windows 8windows 8.1windows rtwindows rt 8.1windows server 2003windows server 2008windows server 2012windows vista
Source: NVD CPE · 11 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (16)
→
http://blog.beyondtrust.com/triggering-ms14-066Exploit · Third Party Advisory
→
http://marc.info/?l=bugtraq&m=142384364031268&w=2Exploit · Mailing List · Third Party Advisory
→
http://secunia.com/advisories/59800Third Party Advisory
→
http://www.kb.cert.org/vuls/id/505120Third Party Advisory · US Government Resource
→
http://www.securityfocus.com/bid/70954Third Party Advisory · VDB Entry
→
http://www.securitysift.com/exploiting-ms14-066-cve-2014-6321-aka-winshock/Exploit · Third Party Advisory
→
http://www.us-cert.gov/ncas/alerts/TA14-318AThird Party Advisory · US Government Resource
→
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-066Patch · Vendor Advisory
→
http://blog.beyondtrust.com/triggering-ms14-066Exploit · Third Party Advisory
→
http://marc.info/?l=bugtraq&m=142384364031268&w=2Exploit · Mailing List · Third Party Advisory
→
http://secunia.com/advisories/59800Third Party Advisory
→
http://www.kb.cert.org/vuls/id/505120Third Party Advisory · US Government Resource
→
http://www.securityfocus.com/bid/70954Third Party Advisory · VDB Entry
→
http://www.securitysift.com/exploiting-ms14-066-cve-2014-6321-aka-winshock/Exploit · Third Party Advisory
→
http://www.us-cert.gov/ncas/alerts/TA14-318AThird Party Advisory · US Government Resource
Quick Facts
CVE IDCVE-2014-6321
CVSS Score10.0 / 10
SeverityCRITICAL
WeaknessCWE-94
CISA KEVNo
Affected1 vendor(s)
PublishedNov 11, 2014
Related CVEs (CWE-94)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2014-6321 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.