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CVE-2016-3237

45
FAUCET Score

CVE-2016-3237 is a Kerberos security feature bypass vulnerability affecting multiple versions of Microsoft Windows, including Windows 7, 8.1, 10, Vista, and Server 2008/2012. This flaw allows man-in-the-middle (MITM) attackers to bypass authentication during a domain account password change by forcing a fallback to NTLM authentication. With a CVSS score of 7.5 (HIGH), successful exploitation could lead to high confidentiality, integrity, and availability impacts due to the network-based attack vector and high complexity. While not listed on CISA's KEV catalog, an ExploitDB entry exists, and there is community discussion and media coverage indicating awareness of this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
1511CPE matchmatch criteria
cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_7:-:sp1:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_8.1:-:*:*:*:*:*:*:*
Range not provided by sourceCPE matchmatch criteria
cpe:2.3:o:microsoft:windows_rt:-:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.6
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
17.18%
Probability of exploitation in next 30 days
EPSS Percentile
96.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
ExploitDB: EDB-40409 · Sep 22, 2016
This CVE's current EPSS score of 0.1718 is in the 96th percentile among its peer group of 1,160 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (25)

microsoftpatch availablevia msrc
Product: Windows Vista Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Windows Vista x64 Edition Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Windows 10 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1511 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1511 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 7 for 32-bit Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Windows 7 for x64-based Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Windows 8.1 for 32-bit systems
View patch
microsoftpatch availablevia msrc
Product: Windows 8.1 for x64-based systems
View patch
microsoftpatch availablevia msrc
Product: Windows RT 8.1
microsoftpatch availablevia msrc
Product: Windows Server 2008 for 32-bit Systems Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 for Itanium-Based Systems Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 for x64-based Systems Service Pack 2
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 R2 for Itanium-Based Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 R2 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for 32-bit Systems
View patch
microsoftpatch availablevia msrc
Product: Windows 10 Version 1607 for x64-based Systems
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012 (Server Core installation)
View patch
microsoftpatch availablevia msrc
Product: Windows Server 2012
View patch

Vendor Advisories (1)

microsoft2016-Aug/CVE-2016-3237Important

Kerberos Security Feature Bypass Vulnerability

Aug 9, 2016

References

docs.microsoft.com / en-us/security-updates/securitybulletins/2016/ms16-101
PatchVendor Advisory
exploit-db.com / exploits/40409
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / bid/92290
Third Party AdvisoryVDB Entry
securitytracker.com / id/1036576
Third Party AdvisoryVDB Entry