CVE-2021-28321

Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability

Description

Diagnostics Hub Standard Collector Service Elevation of Privilege Vulnerability

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
CVSS 2.0 •
EPSS 1.11% Top 25%
Vendor Advisory microsoft.com
Affected: Microsoft Windows 10 Version 1803
Affected: Microsoft Windows 10 Version 1809
Affected: Microsoft Windows Server 2019
Affected: Microsoft Windows Server 2019 (Server Core installation)
Affected: Microsoft Windows 10 Version 1909
Affected: Microsoft Windows Server, version 1909 (Server Core installation)
Affected: Microsoft Windows 10 Version 2004
Affected: Microsoft Windows Server version 2004
Affected: Microsoft Windows 10 Version 20H2
Affected: Microsoft Windows Server version 20H2
Affected: Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8)
Affected: Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
Affected: Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
Affected: Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6)
Affected: Microsoft Microsoft Visual Studio 2015 Update 3
Published at:
Updated at:

References

Link Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28321 patch vendor advisory
http://seclists.org/fulldisclosure/2021/Apr/40 third party advisory mailing list
http://packetstormsecurity.com/files/162251/Microsoft-DiagHub-Privilege-Escalation.html vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2021-28321?
CVE-2021-28321 has been scored as a high severity vulnerability.
How to fix CVE-2021-28321?
To fix CVE-2021-28321, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-28321 being actively exploited in the wild?
It is possible that CVE-2021-28321 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-28321?
CVE-2021-28321 affects Microsoft Windows 10 Version 1803, Microsoft Windows 10 Version 1809, Microsoft Windows Server 2019, Microsoft Windows Server 2019 (Server Core installation), Microsoft Windows 10 Version 1909, Microsoft Windows Server, version 1909 (Server Core installation), Microsoft Windows 10 Version 2004, Microsoft Windows Server version 2004, Microsoft Windows 10 Version 20H2, Microsoft Windows Server version 20H2, Microsoft Microsoft Visual Studio 2019 version 16.9 (includes 16.0 - 16.8), Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8), Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3), Microsoft Microsoft Visual Studio 2019 version 16.7 (includes 16.0 – 16.6), Microsoft Microsoft Visual Studio 2015 Update 3.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.