CVE-2026-76461 is a critical-severity vulnerability (CVSS 9.8), listed in the CISA Known Exploited Vulnerabilities (KEV) catalog as actively exploited.
Summary
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.
Affected tools we track
This advisory affects Cisco. Review the vendor page for current pricing, alternatives and status.
Remediation
It is actively exploited — apply the vendor’s patch immediately and prioritize internet-facing systems. Patch-management tools that can deploy and verify the fix include Action1, Automox, ManageEngine Patch Manager Plus, ManageEngine Endpoint Central. See our best patch management ranking.