But they also have a propensity to contain software bugs that can render their security protections ineffective, allowing hackers to compromise the very networks that these devices were tasked with protecting. In recent years, some of the biggest makers of corporate cybersecurity products, including Barracuda, Check Point, Cisco, Citrix, Fortinet, Ivanti, and Palo Alto Networks, have disclosed zero-day attacks targeting their customers, which have resulted in broader network compromises. According to U.S. cybersecurity agency CISA, the top most routinely exploited vulnerabilities during 2023 were found in enterprise products developed by Citrix, Cisco, and Fortinet, and used by hackers to conduct operations against "high-priority targets."