No legacy software is without risk. AnyDesk 5.3.3 does not have the following modern features:
Recommendation: Use version 5.3.3 only on trusted local networks or via VPN. Never expose the default port 6568 directly to the public internet without a firewall rule limiting source IP addresses. anydesk 5.3.3
This is the area where reviewing a legacy version becomes tricky. No legacy software is without risk
In an era of constant updates, searching for an old version seems counterintuitive. However, several practical reasons keep the demand for AnyDesk 5.3.3 alive: Recommendation: Use version 5