The US Cybersecurity and Infrastructure Security Agency (CISA) has added a Palo Alto Networks PAN-OS vulnerability (CVE-2026-0300) to its Known Exploited Vulnerabilities Catalog, indicating the flaw is being actively exploited by malicious actors. Federal agencies must remediate the vulnerability under Binding Operational Directive 22-01, and CISA urges all organizations to prioritize patching as part of their vulnerability management.