The CyberSec Guru

Networking Basics: The Complete Beginner’s Guide to IP Addresses, Ports, TCP/IP, NAT, DHCP, the OSI Model, and Network Topologies
IP addresses, ports, TCP/IP, NAT, DHCP, and the OSI model explained simply with diagrams, real commands, and security context

Squidbleed (CVE-2026-47729): A 29-Year-Old Heartbleed Hiding in Plain Sight
Squidbleed (CVE-2026-47729): a 29-year-old heap overread in Squid Proxy leaks HTTP Authorization headers across users. Breakdown, PoC, and patch

KPMG Just Admitted the “Wall” Inside Its Own Firm Doesn’t Exist
KPMG admits Optus client data crossed into a Telstra audit bid. Full timeline, whistleblower retaliation, and the regulatory gaps that let it happen

Who Owns Incogni? The Surfshark, Nord Security and Tesonet Chain Behind Data Removal Services
Incogni traces back to Surfshark, Nord Security, and Tesonet, the same group behind proxy giant Oxylabs. Here's the full data-removal ownership chain

Klue Salesforce Breach Explained: Icarus OAuth Attack
Inside the Klue Salesforce breach: how Icarus stole OAuth tokens, the API attack chain, IOCs, victim list, and how to detect and respond

Jurisdiction and VPNs: Why “Based Outside Five Eyes” Isn’t Enough
The "outside Five Eyes" badge is one of six factors that actually determine VPN privacy. This guide covers the CLOUD Act, corporate ownership etc

VPNs Promised to Keep You Safe Online. Here’s How Several of Them Got Caught.
NordVPN hid a breach for 18 months. PureVPN handed data to the FBI. ExpressVPN hired a Project Raven veteran. A clear-eyed look at the VPN industry's biggest trust failures

Beginner’s Guide to Conquering Nimbus on Hack the Box
Conquer Nimbus on Hack The Box like a pro with the beginner's HTB writeup. Dominate this challenge and level up your cybersecurity skills

Two 9.2s in stock NGINX: inside the HTTP/3 QPACK use-after-free and the gRPC heap overflow F5 just patched
F5 patched two critical NGINX flaws (CVSS 9.2): a QPACK use-after-free in HTTP/3 and a gRPC heap overflow. Full technical breakdown and PoCs

Zero Trust Security: What It Actually Means When You Strip Away the Marketing
Deep technical breakdown of Zero Trust architecture - identity, device trust, mTLS, NIST 800-207, ZTNA, and complete implementation roadmap





