Network security

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

Critical VMware vCenter flaw actively exploited in 47 countries

Steve ZurierAugust 12, 2026

Unspecified APT group has made attacks across 361 unique IP addresses in 47 countries.

Today's Top NetSec Headlines

Network Security News

Vulnerability Management

Randomness, Grey, Deepseek, Sonicwall, Spice, CaptiveCrunch, eBay, and Aaran Leyland – SWN #604

August 4, 2026

Randomness, 50 Shades of Grey, Deepseek, Sonicwall, Spice Weasels, CaptiveCrunch, eBay, Aaran Leyland, and More on the Security Weekly News.

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

Critical Infrastructure Security

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Russian hackers target outdated Cisco routers in decade-long espionage campaign.

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...

Vulnerability Management

Palo Alto Networks says patch for exploited PAN-OS firewall bug forthcoming

Steve ZurierMay 7, 2026

Palo Alto confirms that its PAN-OS firewalls were actively exploited by a zero-day for more than a month.

Fast Five

Selected by the SC Media Editorial team every Tuesday.

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Network security

Critical VMware vCenter flaw actively exploited in 47 countries

Today's Top NetSec Headlines

FirewallFalcon tool found hijacking network traffic

New NatJack attack class exploits NAT vulnerabilities to hijack TCP sessions

Cato Networks introduces agentic threat prevention to counter AI-driven attacks

AI amplifies dangling DNS takeover risks, research shows

Network Security: Explained and Explored

Botnets before the ballots: US midterms at risk?

The 2026 FIFA World Cup: A network availability stress test

Next-generation enterprise defense: Managing risk in the age of agentic AI

SASE manages your network access, but who manages your SASE?

AI can accelerate microsegmentation, but it cannot govern policy

The browser is the battlefield: Why security must be where work happens

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Seven ways to secure enterprise virtual desktops

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Network Security News

Randomness, Grey, Deepseek, Sonicwall, Spice, CaptiveCrunch, eBay, and Aaran Leyland – SWN #604

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

FortiBleed campaign steals 110M credentials from FortiGate targets

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

Three critical FortiSandbox bugs rated 9.8 actively exploited

Another Cisco Catalyst SD-WAN Manager bug actively exploited

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

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

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

Palo Alto Networks says patch for exploited PAN-OS firewall bug forthcoming

Fast Five

Selected by the SC Media Editorial team every Tuesday.

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