How severe is CVE-2016-3299?

CVE-2016-3299 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2016-3299 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-3299?

CVE-2016-3299 primarily affects Microsoft Windows 10. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-3299?

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

When was CVE-2016-3299 published?

CVE-2016-3299 was published on 2016-08-09 and last updated on 2026-06-17.

CVE-2016-3299

CVE-2016-3299 is a medium-severity vulnerability in Microsoft Windows 10 with a CVSS 3.x base score of 5.3. Its EPSS exploit-prediction score of 14% places it in the 96th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-284.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 4.3
EPSS exploit prediction: 14% (96th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Microsoft Windows 10
Published: 2016-08-09
Last modified: 2026-06-17

Description

Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allow remote attackers to hijack network traffic or bypass intended Enhanced Protected Mode (EPM) or application container protection mechanisms, and consequently render untrusted content in a browser, by leveraging how NetBIOS validates responses, aka "NetBIOS Spoofing Vulnerability."

Frequently asked questions

What is CVE-2016-3299?: Microsoft Windows Vista SP2, Windows Server 2008 SP2 and R2 SP1, Windows 7 SP1, Windows 8.1, Windows Server 2012 Gold and R2, Windows RT 8.1, and Windows 10 Gold and 1511 allow remote attackers to hijack network traffic or bypass intended Enhanced Protected Mode (EPM) or application container protection mechanisms, and consequently render untrusted content in a browser, by leveraging how NetBIOS validates responses, aka "NetBIOS Spoofing Vulnerability."
How severe is CVE-2016-3299?: CVE-2016-3299 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2016-3299 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 14% (96th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-3299?: CVE-2016-3299 primarily affects Microsoft Windows 10. In total, 11 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-3299?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2016-3299 published?: CVE-2016-3299 was published on 2016-08-09 and last updated on 2026-06-17.

References

Affected products (11)

cpe:2.3:o:microsoft:windows_10:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10:1511:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_10:1607:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_7:*:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_8.1:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_rt_8.1:*:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:-:sp2:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_server_2012:r2:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows_vista:*:sp2:*:*:*:*:*:*

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