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Cisco patches critical Secure Email Gateway zero-day actively exploited in attacks

Cisco patched the critical Secure Email Gateway zero-day vulnerability CVE-2026-76519, which was actively exploited in attacks. The flaw allows remote unauthenticated attackers to send a specially crafted attachment and execute commands with root privileges on the underlying operating system.

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Cisco patches critical Secure Email Gateway zero-day actively exploited in attacks

Cisco patched the critical Secure Email Gateway zero-day vulnerability CVE-2026-76519, which was actively exploited in attacks. The flaw allows remote unauthenticated attackers to send a specially crafted attachment and execute commands with root privileges on the underlying operating system.