BREAKING: Exploited Cisco Secure Email Gateway AMP bug lets attackers write files as root, now on CISA KEV (CVE-2026-76519)

How to fix CVE-2026-76519: upgrade Content Scanner Tools to 25.3.0.5525+ (or AsyncOS 15.5.5-014 / 16.5.0-780). Exploited Cisco Secure Email Gateway AMP File Reputation bug writes files as root; CISA KEV due Oct 17.