@masayuky
Thank you for your time and patience throughout this issue!
As mentioned by @Lu Dai-MSFT , this issue is more related to Microsoft Defender for Endpoint so I'd recommend reaching out to their experts via their Support Process, or through their Microsoft Defender for Endpoint Tech Community for a more detailed response.
From my research, I found some API documentation that might help with your issue, which I'll share below. However, based off your post it sounds like you might've been using the - List exposed devices of one remediation activity API to get the "exposed paths". For more info.
Additional Links:
Tutorial for using Microsoft Defender for Endpoint APIs
Supported Microsoft Defender for Endpoint APIs
If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.
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