CRITICAL ALERT: Multiple vulnerabilities affecting Cisco ASA 5500-X Series devices

Alert from the Australian Cyber Security Centre (ASD/ACSC) warning of active exploitation of multiple critical vulnerabilities in Cisco Secure Firewall ASA and FTD (notably CVE-2025-20333, CVE-2025-20363, CVE-2025-20362) affecting ASA 5500-X and specified software release ranges; these vulnerabilities may allow remote code execution and ROMMON compromise, and the advisory lists IoCs (bootloader/ROMMON verification failure messages and firmware-update.log), mitigation guidance, affected versions, and contact details for reporting confirmed compromises.