CVE-2014-6321

EXPLOITED

Microsoft Windows Schannel WinShock - Crafted Packet Remote Code Execution

Title source: manual
STIX 2.1

Exploitation Summary

CVE-2014-6321 has been observed exploited in the wild (reported by VulnCheck KEV).

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."

References (8)

Core 8
Core References
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert
http://www.us-cert.gov/ncas/alerts/TA14-318A
Exploit, Third Party Advisory x_refsource_misc
http://blog.beyondtrust.com/triggering-ms14-066
Third Party Advisory third-party-advisory x_refsource_secunia
http://secunia.com/advisories/59800
Exploit, Mailing List, Third Party Advisory vendor-advisory x_refsource_hp
http://marc.info/?l=bugtraq&m=142384364031268&w=2
Third Party Advisory, VDB Entry vdb-entry x_refsource_bid
http://www.securityfocus.com/bid/70954
Patch, Vendor Advisory vendor-advisory x_refsource_ms
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-066
Third Party Advisory, US Government Resource third-party-advisory x_refsource_cert-vn
http://www.kb.cert.org/vuls/id/505120

Scores

EPSS 0.9599
EPSS Percentile 99.9%

Details

VulnCheck KEV 2026-03-23
CWE
CWE-94
Status published
Products (11)
microsoft/windows_7
microsoft/windows_8
microsoft/windows_8.1
microsoft/windows_rt
microsoft/windows_rt_8.1
microsoft/windows_server_2003
microsoft/windows_server_2008
microsoft/windows_server_2008 r2 sp1 (2 CPE variants)
microsoft/windows_server_2012
microsoft/windows_server_2012 r2
... and 1 more
Published Nov 11, 2014
Tracked Since Feb 18, 2026