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PRTG support for CVE-2021-26414 mitigation



Microsoft is introducing changes in Windows to mitigate a vulnerability present in DCOM by default (ref "KB5004442 - Manage changes for Windows DCOM Server Security Feature Bypass (CVE-2021-26414)").

In June, manually enabling the vulnerability mitigation broke PRTG's WMI support. According to Microsoft's timetable, a Windows update in 2021-Q4 will see it enabled by default; another update due in 2022-Q1 will see it enabled permanently with no way to disable it.

Does the current stable version of PRTG support this? If not, does Paessler have a plan to implement the changes or provide a workaround?

Thank you

prtg windows wmi

Created on Sep 8, 2021 9:32:58 PM

2 Replies

Accepted Answer



Hi there,

We already checked the change and it seems like that our WMI Sensors will still work with the latest Microsoft updates.

Created on Sep 10, 2021 10:30:18 AM by  Moritz Heller [Paessler Support]



Confirmed - it looks like (one way or another) a PRTG update since June 2021 has resolved the problem.


Created on Sep 11, 2021 1:20:12 PM

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