The CyberSec Guru
Miasma Returns: Leo Platform npm Packages Hit in New Shai-Hulud Supply Chain Wave
A compromised developer account infected 23 Leo Platform npm packages with Miasma malware, using Phantom Gyp binding.gyp execution to compromise 320+ GitHub repositories. Full IOC list inside
Subnetting and CIDR Notation: The Complete Technical Guide
A deep-dive technical guide to subnetting and CIDR notation. Subnet masks, binary math, VLSM, route aggregation, and practical IP design in detail
Germany’s Entire Rail Network Went Dark Last Night. Here’s What Happened.
A GSM-R communications failure brought every Deutsche Bahn train in Germany to a halt late Tuesday. Here's what happened, what's still unknown, and why it matters
Eight-year-old Samsung Knox flaw exposed Galaxy devices to kernel attacks
Samsung patched CVE-2026-20971, a long-running Knox PROCA use-after-free flaw that affected Galaxy devices and could lead to kernel memory corruption
KDDI Breach Exposes Up to 14.22 Million Email Records Across Six Japanese ISPs
KDDI's 2026 data breach exposed up to 14.22M email credentials across six ISPs - BIGLOBE, @nifty, JCOM, and more. What happened and what's next
A critical flaw in libssh2 puts SSH clients at remote code execution risk
CVE-2026-55200 is a CVSS 9.2 heap overflow in libssh2 enabling pre-auth RCE on all versions through 1.11.1. Fix: commit 97acf3d
Tata Electronics Confirms Cyberattack as World Leaks Posts 630GB of Alleged Apple and Tesla Trade Secrets
Tata Electronics confirmed a cyberattack after World Leaks posted 630GB of alleged Apple and Tesla files including iPhone specs and Tesla trade secrets
Cloudflare Down: Fiber Cut in Eastern North America Takes Half the Internet With It
Cloudflare is down today after a fiber cut in Eastern North America. X, Zoom, Google, AWS and more are affected. Here's what happened and why
The Mythos/NSA Breach Claim: What’s Actually Confirmed
Senator Warner says the NSA director claims Mythos breached classified systems in hours. Here's what's confirmed, what Anthropic disputes, and what's still unverified
Inside GentleKiller: A Technical Deep-Dive into the Gentlemen RaaS EDR-Killer Supply Chain
A technical breakdown of GentleKiller, the BYOVD-based EDR killer Gentlemen ransomware builds and distributes to affiliates - variants, drivers, IOCs, and detection
