CVE-2026-76519

A vulnerability in the Advanced Malware Protection (AMP) feature of Cisco Secure Email Gateway could allow an unauthenticated, remote attacker to write arbitrary files on the underlying operating system. This vulnerability is due to improper handling of email attachments when the file reputation service is enabled. An attacker could exploit this vulnerability by sending an email that contains a crafted attachment through an affected device. A successful exploit could allow the attacker to write arbitrary files and execute commands with root privileges on the underlying operating system.

Action and remediation

Review the vendor advisory, determine affected versions, apply the vendor-supported fix or mitigation, and validate the change.

Check vendor advisories and affected-version data before remediation. Validate affected software, identify internet reachability and business criticality in your authorised environment, and confirm mitigating controls. No AI-generated fix is asserted as vendor guidance.

Evidence links