Cisco patches exploited zero-day vulnerability in Secure Email Gateway

The Next Interrupt briefing

AI-generated · Updated · Oct 15, 2026 · How we work

Cisco has issued a fix and warned of an actively exploited zero-day security vulnerability in its Secure Email Gateway. The flaw allows remote, unauthenticated attackers to write arbitrary files to the operating system and execute commands with root privileges. [1][2]

Across the publications

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Cybersecurity illustration · BleepingComputer

[2] BleepingComputerPublisher coverage

Oct 14, 12:29 PM CT

Cisco patches new Secure Email Gateway zero-day exploited in attacks

Cisco has patched another actively exploited zero-day flaw in its Secure Email Gateway (SEG) that lets remote unauthenticated attackers execute commands with root privileges.

Excerpt · BleepingComputer

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Cybersecurity illustration · SecurityWeek

[1] SecurityWeekPublisher coverage

Oct 15, 1:34 AM CT