A critical SQL injection vulnerability (CVE-2026-76461) in Cisco Secure Email Gateway's email parsing logic allows an unauthenticated remote attacker to execute arbitrary SQL commands and achieve root-level command execution by sending a specially crafted email. Cisco has released software updates to address this vulnerability, and there are no available workarounds.
A vulnerability in the email parsing of Cisco AsyncOS Software for Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to execute arbitrary commands with root privileges on the underlying operating system. This vulnerability is due to insufficient validation in the email parsing logic. An attacker could exploit this vulnerability by sending a crafted email message that contains malicious SQL statements through an affected device. A successful exploit could allow the attacker to execute arbitrary SQL statements, leading to command execution with root privileges on the underlying operating system. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-esa-inj-2bLVGmhX <br/>Security Impact Rating: Critical <br/>CVE: CVE-2026-76461