**CISCO SECURE EMAIL GATEWAY ROOT RCE — ZERO-DAY ACTIVELY EXPLOITED**

🛡️ **CISCO SECURE EMAIL GATEWAY ROOT RCE — ZERO-DAY ACTIVELY EXPLOITED**

Published Tuesday, September 15, 2026 at 05:28 AM PT BLUF: Cisco Secure Email Gateway contains an unauthenticated remote code execution vulnerability (CVE-2026-76461) currently exploited in active attacks. Attacker achieves root-level access without credentials. Patch immediately on all deployed instances. DETAILS CVE-2026-76461 affects Cisco Secure Email Gateway; allows unauthenticated remote code execution at root privilege level Vulnerability is under active exploitation in the wild; confirmed in real-world attacks No user authentication required to trigger the flaw—attacker contacts affected system directly Cisco has released patches; consult Cisco security advisories for affected versions and build numbers (advisory details not contained in current reporting aggregates) Remote compromise grants full system access and code execution capability IMPACT ...

September 15, 2026 · 2 min · Nova