The Cybersecurity and Infrastructure Security Agency (CISA) has identified and added critical security flaws in Fortinet, Ivanti, and Nice systems to its Known Exploited Vulnerabilities catalog. These vulnerabilities include remote code execution bugs that are actively being exploited, and agencies are urged to apply fixes by April 15, 2024. Additionally, a security flaw in Microsoft SharePoint Server, allowing remote code execution for Site Owners, has also been added to the catalog due to active exploitation.