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The Email Security Gateway Is Now An Attack Origin

CVE-2026-76461 turns one crafted message into a root-level containment problem

Cisco Secure Email Gateway CVE-2026-76461 is actively exploited and can provide root command execution through email parsing. This article explains how to contain the appliance across mail, management, egress, identity, and evidence paths.

Posted by Alexander Goller on Tuesday, September 15, 2026

Voice Infrastructure Needs Containment, Too

Cisco Unified CM exploitation is a reminder that communication platforms are high-trust infrastructure

Cisco Unified CM CVE-2026-20230 shows why voice and collaboration systems need microsegmentation, management-plane isolation, and clear blast-radius boundaries before compromise turns into lateral movement.

Posted by Alexander Goller on Tuesday, July 7, 2026

Deploying Cisco ACI and VMware NSX

A podcast by packetpushers

One of my favourite networking podcasts, PacketPushers has a great episode on integrating Cisco ACI and VMware NSX at the same time. I really enjoyed listening to this episode, one reason for sure was that Derek Wilson seems to be a really nice and knowledgeable person, but the other is that he shared some valuable insights into deploying ACI and its uses for big companies. My key takeaways from the episode are:

Posted by     Alexander Goller on Saturday, October 12, 2019

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Principal Solutions Architect, Zero Trust Evangelist, BSD enthusiast

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2026 ai-security attacks breach-containment cisco cloud-security containers containment cyber-resilience hard-truths hybrid-cloud identity identity-security kubernetes lateral-movement links management-plane metrics microsegmentation microservices mitre mitre-attack network-segmentation oauth ransomware segmentation supply-chain vulnerability-management weekly-roundup zero-trust