I'm also getting this on some EX2013/CU23 and EX2019/CU11, all patched with SU 01/2022 (and Mail Security 8.0).
In addition, two servers have the same detection in c:\windows\temp (?!!), all within the last 18 hours.
Getting a bit nervous...
If anyone got news, I'mlooking forward to hear about this...
Thanks!