Network security

Mastering Network Security: Your Resource for Segmentation, Monitoring, Perimeter Defense, and More.

Russian hack attack concept, on the computer keyboard. 3D rendering

Russia’s FSB attacks critical infrastructure, says 12 Western nations

Steve ZurierJuly 13, 2026

Russian hackers target outdated Cisco routers in decade-long espionage campaign.

Today's Top NetSec Headlines

Network Security News

Network Security

FortiBleed campaign steals 110M credentials from FortiGate targets

Laura FrenchJune 24, 2026

A tool called FortigateSniffer abuses a diagnostic utility to continuously monitor network traffic.

Network Security

F5 releases out-of-band patches for two critical NGINX bugs

Steve ZurierJune 18, 2026

F5 issued urgent patches for two critical NGINX flaws that could enable DoS or code execution.

(Credit: Rafael Henrique – stock.adobe.com)

Network Security

Three critical FortiSandbox bugs rated 9.8 actively exploited

Steve ZurierJune 16, 2026

Active exploitation of FortiSandbox flaws prompt urgent patching calls from security experts.

Network Security

Another Cisco Catalyst SD-WAN Manager bug actively exploited

Steve ZurierJune 5, 2026

Cisco warns of an exploited SD-WAN flaw that can enable remote code execution and network compromise.

Network Security

‘Underminr’ exploitation poses similar risks to domain fronting, researchers say

Laura FrenchMay 22, 2026

ADAMnetworks estimates about 42% of domains could be abused using the technique.

Vulnerability Management

10.0 Cisco Catalyst SD-WAN Controller bug added to CISA’s KEV list

Steve ZurierMay 15, 2026

Maximum-severity bug an authentication bypass flaw that’s considered the highest value target in an attacker’s playbook.

Network Security

Getting Rid of Your VPN – Rob Allen – PSW #925

May 7, 2026

Rob Allen from Threatlocker joins us to discuss the risks associated with VPN appliances and how to implement better security solutions that don't leave you hanging out on the open Internet. The interview segment is sponsored by ThreatLocker. Visit https://securityweekly.com/threatlockerrsac to learn more about them! In the Security News: Less deta...