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Critical Cisco Secure Email Gateway zero-day gives attackers root access

Published

15 September 2026

Topic

technology

Sectors

Cybersecurity

Geography

United States

Source

Read at csoonline.com

Verified

Fusion42 · 15 September 2026 · Fusion42 review

A critical zero-day vulnerability in Cisco Secure Email Gateway allows attackers to gain root-level unauthenticated remote code execution, providing a powerful foothold to compromise targeted systems.

This Wire brief sits within Fusion42's coverage of Cybersecurity, and 3 sources have reported it.

◆ The Wire takeaway

This Cisco email security flaw opens a fast lane for attackers to take over critical infrastructure. You need to patch immediately or lose control of your email gateway.

Coverage

3 sources · 15 Sep 2026

Related on Wire

Topics

Cybersecurityciscozero-dayemail-securityrcecybersecurity