Mmastodon TechnologyCybersecurity first seen 2 d ago, last 2 d ago, peak #1

Cisco Secure Email Gateway Zero-Day Actively Exploited

Original: (diesec.com) Active Exploitation of Cisco Secure Email Gateway Zero-Day Vulnerability (CVE-2026-76519) Enables Root Acce

Security researchers report active exploitation of a critical zero-day vulnerability, tracked as CVE-2026-76519, in Cisco Secure Email Gateway. The flaw can reportedly be exploited by unauthenticated attackers to gain root access on affected appliances. Organizations running the gateway are being urged to review Cisco guidance and apply mitigations or patches as they become available.

Why now: Active in-the-wild exploitation of a zero-day giving root access to a widely deployed email security product is an urgent concern for security teams.

CiscoCisco Secure Email GatewayCVE-2026-76519diesec.com

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Evidence

• (diesec.com) Active Exploitation of Cisco Secure Email Gateway Zero-Day Vulnerability (CVE-2026-76519) Enables Root Access In brief - This article discusses a critical zero-day vulnerability (CVE-2026-76519) in the Cisco Secure Email Gateway that allows unauthenticated… · orlysec@swecyb.com · 3

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