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."
CVE-2014-6321
NONECVSS 0.0Trending — 3 sources updated this weekElevated
0.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
- High exploitation likelihood — EPSS 96%
CISA-KEV: Not listedEPSS: 96%CVSS: —Exploit: NoneExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- —
- EG Score
- 0.0(none)
- EG Risk
- 0EG Risk 0/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses intrinsic severity with real-world exploitation and automatability, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. It is distinct from the 0–10 EG Score, which measures severity.
- EPSS
- 99.9%
- KEV
- Not listed
Published
November 11, 2014
Last Modified
May 6, 2026
References (16)
- secure@microsofthttp://blog.beyondtrust.com/triggering-ms14-066
- secure@microsofthttp://marc.info/?l=bugtraq&m=142384364031268&w=2
- secure@microsofthttp://secunia.com/advisories/59800
- secure@microsofthttp://www.kb.cert.org/vuls/id/505120
- secure@microsofthttp://www.securityfocus.com/bid/70954
- secure@microsofthttp://www.securitysift.com/exploiting-ms14-066-cve-2014-6321-aka-winshock/
- secure@microsofthttp://www.us-cert.gov/ncas/alerts/TA14-318A
- secure@microsofthttps://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-066
- af854a3a-2127-422b-91ae-364da2661108http://blog.beyondtrust.com/triggering-ms14-066
- af854a3a-2127-422b-91ae-364da2661108http://marc.info/?l=bugtraq&m=142384364031268&w=2
- af854a3a-2127-422b-91ae-364da2661108http://secunia.com/advisories/59800
- af854a3a-2127-422b-91ae-364da2661108http://www.kb.cert.org/vuls/id/505120
- af854a3a-2127-422b-91ae-364da2661108http://www.securityfocus.com/bid/70954
- af854a3a-2127-422b-91ae-364da2661108http://www.securitysift.com/exploiting-ms14-066-cve-2014-6321-aka-winshock/
- af854a3a-2127-422b-91ae-364da2661108http://www.us-cert.gov/ncas/alerts/TA14-318A
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 9× in last 7d / 11× in last 30d)
Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.
- 2026-07-23 14:14 UTCEPSS rescore
- 2026-07-23 01:18 UTCGHSA enrichment
- 2026-07-23 01:17 UTCGHSA enrichment
- 2026-07-23 01:15 UTCGHSA enrichment
- 2026-07-23 01:13 UTCEG score recompute▼ 9.00
- 2026-07-23 00:17 UTCEG score recompute
- 2026-07-22 21:55 UTCEG score recompute
- 2026-07-19 02:26 UTCEPSS rescore
- 2026-07-19 02:26 UTCEPSS rescore
- 2026-07-07 13:42 UTCEPSS rescore
- 2026-07-06 16:24 UTCEPSS rescore
- 2026-06-23 21:30 UTCEPSS rescore
- 2026-06-23 21:30 UTCEPSS rescore
- 2026-06-22 14:22 UTCEPSS rescore
- 2026-06-22 14:22 UTCEPSS rescore
- 2026-06-21 01:57 UTCEPSS rescore
- 2026-06-13 22:57 UTCEPSS rescore
- 2026-06-08 14:14 UTCEPSS rescore
- 2026-06-06 13:45 UTCEPSS rescore
- 2026-06-06 13:45 UTCEPSS rescore
- 2026-06-05 22:44 UTCEPSS rescore
- 2026-06-02 20:10 UTCEPSS rescore
- 2026-06-02 20:10 UTCEPSS rescore
- 2026-05-28 15:06 UTCEG score recompute
- 2026-05-28 15:06 UTCGHSA enrichment
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- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-28 13:42 UTCEPSS rescore
- 2026-05-26 13:41 UTCEPSS rescore
- 2026-05-26 07:16 UTCEPSS rescore
- 2026-05-24 16:43 UTCEPSS rescore
- 2026-05-22 21:15 UTCEPSS rescore
- 2026-05-22 21:15 UTCEPSS rescore
- 2026-05-22 21:15 UTCEPSS rescore
- 2026-05-18 21:29 UTCEPSS rescore
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Frequently asked(4)
What is CVE-2014-6321?
CVE-2014-6321 is a none vulnerability published on November 11, 2014. 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…
When was CVE-2014-6321 disclosed?
CVE-2014-6321 was first published in the National Vulnerability Database on November 11, 2014, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2014-6321 actively exploited?
CVE-2014-6321 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
How do I remediate CVE-2014-6321?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2014-6321, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.
Dependency Blast Radius
Explore the affected products and dependency analysis for CVE-2014-6321
Is Your Infrastructure Affected by CVE-2014-6321?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.