Since RealVNC has transitioned to the "RealVNC Connect" (version 7.x+) ecosystem, they no longer actively promote version 5.x on their main landing pages. However, you can still find it through these channels:
Check the RealVNC Help Center - Legacy Products section. While the direct EXE may be hidden, they often provide links for users with older license keys. download vnc-viewer-5.2.3-windows-64 bit.exe
Finding and downloading the exact file can be a challenge since it is now considered a legacy version. Originally released in early 2015, version 5.2.3 remains popular for users who need a lightweight, standalone remote desktop tool that doesn't require a modern subscription. Where to Download VNC Viewer 5.2.3 Since RealVNC has transitioned to the "RealVNC Connect"
This tech site hosts a mirror of RealVNC 5.2.3 originally verified upon its 2015 release. Finding and downloading the exact file can be
Several reputable software archives still host the original 5.2.3 installer.
You can find RealVNC 5.2.3.8648.0 for Windows which includes the 64-bit standalone viewer.
Offers a direct download for RealVNC 5.2.3 for Windows PC. Why Users Still Use Version 5.2.3 Download VNC Viewer by RealVNC®