Cisco Secure Email Gateway Zero-Day Exploited Again

By Editorial Team | October 19, 2026
Cisco Secure Email Gateway zero-day CVE-2026-76519: steel inspection box with an envelope in its slot and orange light leaking out

A Cisco Secure Email Gateway zero-day is under attack: one email with a crafted attachment lets an unauthenticated attacker write files and run commands as root. Cisco tracks it as CVE-2026-76519 (CVSS 9.8), and CISA added it to the Known Exploited Vulnerabilities catalog on October 14. It is the second Secure Email Gateway flaw exploited…

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Cisco Secure Email Gateway Vulnerability: Patch Now

By Editorial Team | September 17, 2026
A critical Cisco Secure Email Gateway vulnerability lets one crafted email grant root access, no login needed. Active exploitation confirmed.

A critical Cisco Secure Email Gateway vulnerability, CVE-2026-76461 (CVSS 9.8), lets an attacker gain root access to the appliance by sending a single crafted email, no login or admin access required. Cisco confirmed active exploitation and published its advisory September 14; CISA added the flaw to its Known Exploited Vulnerabilities catalog the same day, and…

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