HIGH
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."
Published Nov 11, 2014
10.0
HIGHCVSS 2.0
EPSS 95.99%
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."
Affected products
No data.
OR
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- n/a
- r2
- r2
- n/a
- r2
- n/a
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
10.0 HIGH NVD
AV:N/AC:L/Au:N/C:C/I:C/A:C
Access Vector Network
Access Complexity Low
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
95.99% 0.95988
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.95988
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (28 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 95.99% (0.95988) | 99.87th | v5 (v2026.06.15) |
| Jun 15, 2026 | 95.99% (0.95988) | 99.87th | v5 (v2026.06.15) |
| May 25, 2026 | 93.48% (0.93480) | 99.83th | v4 (v2025.03.14) |
| Dec 1, 2025 | 92.44% (0.92439) | 99.72th | v4 (v2025.03.14) |
| Nov 4, 2025 | 93.51% (0.93514) | 99.82th | v4 (v2025.03.14) |
| Oct 1, 2025 | 92.37% (0.92368) | 99.73th | v4 (v2025.03.14) |
| Sep 4, 2025 | 93.40% (0.93398) | 99.81th | v4 (v2025.03.14) |
| Sep 1, 2025 | 92.37% (0.92368) | 99.72th | v4 (v2025.03.14) |
| Jul 21, 2025 | 93.62% (0.93619) | 99.83th | v4 (v2025.03.14) |
| May 4, 2025 | 92.52% (0.92520) | 99.72th | v4 (v2025.03.14) |
| May 1, 2025 | 89.14% (0.89139) | 99.50th | v4 (v2025.03.14) |
| Mar 30, 2025 | 92.72% (0.92723) | 99.75th | v4 (v2025.03.14) |
| Mar 29, 2025 | 90.67% (0.90666) | 99.55th | v4 (v2025.03.14) |
| Mar 23, 2025 | 92.72% (0.92723) | 99.75th | v4 (v2025.03.14) |
| Mar 19, 2025 | 91.27% (0.91270) | 99.65th | v4 (v2025.03.14) |
| Mar 17, 2025 | 93.07% (0.93070) | 99.78th | v4 (v2025.03.14) |
| Dec 17, 2024 | 93.51% (0.93509) | 99.31th | v3 (v2023.03.01) |
| Dec 12, 2024 | 96.32% (0.96321) | 99.61th | v3 (v2023.03.01) |
| Jun 23, 2024 | 96.91% (0.96909) | 99.72th | v3 (v2023.03.01) |
| Mar 17, 2024 | 97.30% (0.97305) | 99.86th | v3 (v2023.03.01) |
| Jul 19, 2023 | 97.36% (0.97362) | 99.83th | v3 (v2023.03.01) |
| Apr 26, 2023 | 97.37% (0.97368) | 99.81th | v3 (v2023.03.01) |
| Mar 17, 2023 | 97.33% (0.97333) | 99.77th | v3 (v2023.03.01) |
| Mar 7, 2023 | 97.32% (0.97324) | 99.76th | v3 (v2023.03.01) |
| Mar 6, 2023 | 89.53% (0.89532) | 99.83th | v2 (v2022.01.01) |
| Jun 12, 2022 | 89.53% (0.89532) | 99.81th | v2 (v2022.01.01) |
| Apr 1, 2022 | 88.63% (0.88625) | 99.80th | v2 (v2022.01.01) |
| Feb 4, 2022 | 87.85% (0.87849) | 99.74th | v2 (v2022.01.01) |
Weaknesses (1)
References (8)
- http://blog.beyondtrust.com/triggering-ms14-066 x_refsource_MISCExploitThird Party Advisory
- http://marc.info/?l=bugtraq&m=142384364031268&w=2 vendor-advisoryx_refsource_HPExploitMailing ListThird Party Advisory
- http://secunia.com/advisories/59800 third-party-advisoryx_refsource_SECUNIAThird Party Advisory
- http://www.kb.cert.org/vuls/id/505120 third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource
- http://www.securityfocus.com/bid/70954 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitysift.com/exploiting-ms14-066-cve-2014-6321-aka-winshock/ x_refsource_MISCExploitThird Party Advisory
- http://www.us-cert.gov/ncas/alerts/TA14-318A third-party-advisoryx_refsource_CERTThird Party AdvisoryUS Government Resource
- https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-066 vendor-advisoryx_refsource_MSPatchVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| http://blog.beyondtrust.com/triggering-ms14-066 | x_refsource_MISCExploitThird Party Advisory | |
| http://marc.info/?l=bugtraq&m=142384364031268&w=2 | vendor-advisoryx_refsource_HPExploitMailing ListThird Party Advisory | |
| http://secunia.com/advisories/59800 | third-party-advisoryx_refsource_SECUNIAThird Party Advisory | |
| http://www.kb.cert.org/vuls/id/505120 | third-party-advisoryx_refsource_CERT-VNThird Party AdvisoryUS Government Resource | |
| http://www.securityfocus.com/bid/70954 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitysift.com/exploiting-ms14-066-cve-2014-6321-aka-winshock/ | x_refsource_MISCExploitThird Party Advisory | |
| http://www.us-cert.gov/ncas/alerts/TA14-318A | third-party-advisoryx_refsource_CERTThird Party AdvisoryUS Government Resource | |
| https://docs.microsoft.com/en-us/security-updates/securitybulletins/2014/ms14-066 | vendor-advisoryx_refsource_MSPatchVendor Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Nov 11, 2014
Updated Aug 6, 2024
Reserved Sep 11, 2014
Link CVE-2014-6321
CISA Vulnrichment
Updated n/a