I see you are the customer who asked our APAC Technical Expert about this CVE, and to date, no one has reported any issue - just curiosity.
Further assuming you have read NetApp's alert on the topic and are wondering if HNAS is vulnerable.
https://kb.netapp.com/Advice_and_Troubleshooting/Data_Storage_Software/ONTAP_OS/Windows_Server_KB5008380_%2F%2F_CVE-2021-42287_in_Enforcement_mode_breaks_ONTAP_9_CIFS_Authentication
Our Technical in APAC @Guogang Zhao has been investigating with our Eng team as well. Currently we are in the assessment mode (patching lab DC's, etc) and setting up environments for tests.