CISA Alerts on Active Exploitation of Cisco Firewall Zero-Day Vulnerability

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has issued a warning regarding active exploitation of a critical zero-day vulnerability (CVE-2026-20316) in Cisco Secure Firewall Management Center (FMC) Software. This flaw, involving static user credentials, allows unauthenticated remote attackers to access sensitive data. CISA urges federal agencies to apply Cisco's released hotfixes by August 1, 2026, to mitigate the risk.