Security Patch Management: Why Unpatched Systems Are Your Biggest Cyber Risk

Unpatched software is the leading cause of ransomware and data breaches. Learn how security patch management protects Toronto businesses and what a proper patching program looks like.

By Damir Grubisa  ·  Founder & CEO, The Cyber Arm Security  ·  Published March 2025  ·  Updated March 2026

About the Author

Damir Grubisa is the Founder & CEO of The Cyber Arm Security and Group 4 Networks, Toronto’s leading managed cybersecurity MSSP. With 15+ years protecting Canadian businesses from cyber threats, Damir specializes in managed detection & response (MDR), PIPEDA/PHIPA compliance, and AI-powered security operations for SMBs and enterprise organizations across the GTA and nationwide. Connect on LinkedIn →