The recent sell-off of this cybersecurity leader is giving investors a good buying opportunity.As technology gets incorporated into every facet of the modern economy, it's becoming clearer that no company can escape the need for robust cybersecurity protection. Last year, 75% of companies were at risk of a cyberattack, according to Statista.Thanks to its expanding lineup of firewall and security offerings, Fortinet (FTNT 1.29%) has become a leader in protecting these companies from such threats.But Fortinet ...