CISA Warns of Cisco Secure Email Gateway 0-Day Vulnerability Actively Exploited in Attacks
CISA added actively exploited Cisco Secure Email Gateway SQL injection flaw CVE-2026-76461 to its KEV catalog, enabling unauthenticated root command execution.
CVE-2026-76461 is an unauthenticated SQL injection (CWE-89) in Cisco AsyncOS for Cisco Secure Email Gateway appliances, allowing remote attackers to execute arbitrary OS commands with root privileges. CISA added the flaw to the KEV catalog on September 14, 2026, requiring federal civilian agencies to apply vendor mitigations by September 17, 2026, and forensic triage under BOD 26-04. A compromised gateway could let attackers alter email security policies, access stored messages, disable logging, and pivot into enterprise networks.