How severe is CVE-2016-3226?

CVE-2016-3226 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2016-3226 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-3226?

CVE-2016-3226 primarily affects Microsoft Windows Server 2008. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-3226?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2016-3226 published?

CVE-2016-3226 was published on 2016-06-16 and last updated on 2026-06-17.

CVE-2016-3226

CVE-2016-3226 is a medium-severity vulnerability in Microsoft Windows Server 2008 with a CVSS 3.x base score of 6.5. Its EPSS exploit-prediction score of 11% places it in the 95th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 11% (95th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Microsoft Windows Server 2008
Published: 2016-06-16
Last modified: 2026-06-17

Description

Active Directory in Microsoft Windows Server 2008 R2 SP1 and Server 2012 Gold and R2 allows remote authenticated users to cause a denial of service (service hang) by creating many machine accounts, aka "Active Directory Denial of Service Vulnerability."

Frequently asked questions

What is CVE-2016-3226?: Active Directory in Microsoft Windows Server 2008 R2 SP1 and Server 2012 Gold and R2 allows remote authenticated users to cause a denial of service (service hang) by creating many machine accounts, aka "Active Directory Denial of Service Vulnerability."
How severe is CVE-2016-3226?: CVE-2016-3226 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2016-3226 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 11% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-3226?: CVE-2016-3226 primarily affects Microsoft Windows Server 2008. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-3226?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-3226 published?: CVE-2016-3226 was published on 2016-06-16 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:-:gold:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:datacenter:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:essentials:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:standard:*:*:*

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