CVE-2014-6321

Name: CVE-2014-6321
Creator: NVD / NIST
Published: 2014-11-11T22:55:04.997+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 95.99%

Last modified Jun 17, 2026

CVE-2014-6321 is a vulnerability of currently unknown severity. 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.". EPSS estimates a 95.99% chance of exploitation in the next 30 days.

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."

Metrics

EPSS Probability

95.99%

99.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-94

Affected Software

Vendor	Product	Versions	Update
Microsoft	Windows 7	All versions	Sp1
Microsoft	Windows 8	All versions	—
Microsoft	Windows 8.1	All versions	—
Microsoft	Windows Rt	All versions	—
Microsoft	Windows Rt 8.1	All versions	—
Microsoft	Windows Server 2003	All versions	Sp2
Microsoft	Windows Server 2008	All versions	Sp2
Microsoft	Windows Server 2008	r2	Sp1
Microsoft	Windows Server 2012	All versions	—
Microsoft	Windows Server 2012	r2	—
Microsoft	Windows Vista	All versions	Sp2

References

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
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-066Patch, Vendor Advisory

Timeline

Published: Nov 11, 2014
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2014-6321?

How severe is CVE-2014-6321?

Severity scoring for CVE-2014-6321 is pending analysis. The EPSS model estimates a 95.99% probability of exploitation in the next 30 days.

How do I fix CVE-2014-6321?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2014-6321?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST