WARNING: Your ClamAV installation is OUTDATED! error when running AV

My Cloud OS 5 My Cloud EX
4

So MCH got Debian 11 on august 1st with its newer firmware 9.5.0-186.

So we should get an updated My Cloud OS5 firmware as well sometimes soon with not as old software versions, since Debian is meant to be running older / more solid software, and in addition WD chose to rely on the oldstable branch and not the stable branch.