The CyberSec Guru

Networking Basics for Beginners

Networking Basics: The Complete Beginner’s Guide to IP Addresses, Ports, TCP/IP, NAT, DHCP, the OSI Model, and Network Topologies

The CyberSec Guru

IP addresses, ports, TCP/IP, NAT, DHCP, and the OSI model explained simply with diagrams, real commands, and security context

Squidbleed CVE-2026-47729

Squidbleed (CVE-2026-47729): A 29-Year-Old Heartbleed Hiding in Plain Sight

The CyberSec Guru

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

KPMG Ethical Wall Failure

KPMG Just Admitted the “Wall” Inside Its Own Firm Doesn’t Exist

The CyberSec Guru

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

Who Owns Incogni? The Surfshark, Nord Security and Tesonet Chain Behind Data Removal Services

The CyberSec Guru

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

Klue Salesforce Breach Explained: Icarus OAuth Attack

The CyberSec Guru

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

Jurisdiction and VPNs: Why “Based Outside Five Eyes” Isn’t Enough

The CyberSec Guru

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 Privacy

VPNs Promised to Keep You Safe Online. Here’s How Several of Them Got Caught.

The CyberSec Guru

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

Mastering Nimbus Beginner's Guide from HackTheBox

Beginner’s Guide to Conquering Nimbus on Hack the Box

The CyberSec Guru

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

CVE-2026-42530 & CVE-2026-42055

Two 9.2s in stock NGINX: inside the HTTP/3 QPACK use-after-free and the gRPC heap overflow F5 just patched

The CyberSec Guru

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

Zero Trust Security: What It Actually Means When You Strip Away the Marketing

The CyberSec Guru

Deep technical breakdown of Zero Trust architecture - identity, device trust, mTLS, NIST 800-207, ZTNA, and complete implementation roadmap