Cisco make-me-root email bug exploited as a 0-day by unknown crims

Cisco “strongly” implored customers to patch yet another critical, make-me-root vulnerability in its Secure Email Gateway (SEG), one that has already been exploited in zero-day attacks. A Cisco spokesperson told The Register that the critical vuln, which received a 9.8 out of 10 CVSS rating, affects “a limited number of customers.” The bug, now tracked as CVE‑2026‑76519, allows remote, unauthenticated attackers to write files and execute commands with root privileges on the appliance’s operating