CVE-2018-8320

Name: CVE-2018-8320
Creator: NVD / NIST
Published: 2018-10-10T13:29:01.323+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 4.74%

Last modified Jun 17, 2026

CVE-2018-8320 is a vulnerability of currently unknown severity. A security feature bypass vulnerability exists in DNS Global Blocklist feature, aka "Windows DNS Security Feature Bypass Vulnerability." This affects Windows Server 2012 R2, Windows Server 2008, Windows Server 2012, Windows Server 2019, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.. EPSS estimates a 4.74% chance of exploitation in the next 30 days.

Description

A security feature bypass vulnerability exists in DNS Global Blocklist feature, aka "Windows DNS Security Feature Bypass Vulnerability." This affects Windows Server 2012 R2, Windows Server 2008, Windows Server 2012, Windows Server 2019, Windows Server 2016, Windows Server 2008 R2, Windows 10, Windows 10 Servers.

Metrics

EPSS Probability

4.74%

90.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions	Update
Microsoft	Windows 10	1607	—
Microsoft	Windows 10	1709	—
Microsoft	Windows 10	1803	—
Microsoft	Windows 10	1809	—
Microsoft	Windows Server 2008	All versions	Sp1
Microsoft	Windows Server 2012	All versions	—
Microsoft	Windows Server 2012	r2	—
Microsoft	Windows Server 2016	All versions	—
Microsoft	Windows Server 2016	1709	—
Microsoft	Windows Server 2016	1803	—
Microsoft	Windows Server 2019	All versions	—

References

http://www.securityfocus.com/bid/105503Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041830Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8320Patch, Vendor Advisory
http://www.securityfocus.com/bid/105503Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1041830Third Party Advisory, VDB Entry
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8320Patch, Vendor Advisory

Timeline

Published: Oct 10, 2018
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2018-8320?

How severe is CVE-2018-8320?

Severity scoring for CVE-2018-8320 is pending analysis. The EPSS model estimates a 4.74% probability of exploitation in the next 30 days.

How do I fix CVE-2018-8320?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-8320?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST