Microsoft 365 users targeted by new phishing threat that bypasses MFA
Microsoft 365 access tokens are being targeted by an emerging Phishing-as-a-Service (PhaaS) platform called Kali365, the FBI is warning. First observed in April 2026, Kali365 …
Meet Fractal, an OS made for microarchitecture reverse engineering
Probing how a CPU isolates user code from kernel code is messy work. Researchers patch kernels, write drivers, or boot stripped-down bare-metal programs, and any of those …
Downtime has become a $600 billion business problem
The average cost of downtime has reached $600 billion for the Global 2000, a 50% increase in two years. According to Splunk’s The Hidden Costs of Downtime report, unplanned …
The new economics of fraud: Cheaper, faster, more convincing
Scams have become one of the fastest-growing consumer risks, driven by AI-enabled impersonation, social engineering, and sophisticated attack methods, according to Visa’s …
New infosec products of the week: May 22, 2026
Here’s a look at the most interesting products from the past week, featuring releases from ASAPP, Babel Street, CTERA, Forward, Riverbed, and Trust3 AI. Babel Street targets …
Microsoft open-sources tools for designing and testing AI agents
Microsoft has open-sourced two tools aimed at bringing security discipline to AI agent development: Clarity, a structured design review tool, and RAMPART, a continuous testing …
Authorities dismantle First VPN, used by ransomware actors
First VPN, a virtual private network service marketed to cybercriminals, promising anonymity for its users, was taken offline on May 19 and 20 as part of Operation Saffron. …
GitHub, Grafana Labs breaches traced back to TanStack supply chain compromise
GitHub CISO Alexis Wales has named the malicious VS Code extension behind the breach they suffered at the hands of the threat group TeamPCP: Nx Console, a popular developer …
Microsoft Defender vulnerabilities exploited in the wild (CVE-2026-41091, CVE-2026-45498)
Attackers are exploiting two Microsoft Defender vulnerabilities (CVE-2026-41091 and CVE-2026-45498), Microsoft acknowledged and CISA confirmed by adding them to its Known …
Why AI changed the threat model for travel technology
In this Help Net Security interview, Devon Bryan, SVP, Global CSO at Booking Holdings, reflects on his path from Air Force network security engineer to global CSO across …
Most dark web activity revolves around a handful of topics
Dark web activity often becomes visible during marketplace seizures, major data leaks, or sudden spikes in criminal activity. Those events can create an impression of an …
AI red teaming agents change how LLMs get tested
Adversarial probing of LLMs has piled up a sprawling toolkit over the past three years. Attack techniques with names like Tree of Attacks with Pruning, Crescendo, and Skeleton …
Featured news
Resources
Don't miss
- Bots with good manners are better at fooling people on social media
- Zero-click RCE vulnerability hit four major AI coding agents, two remain unpatched
- CISA wants critical infrastructure orgs and smaller security teams to start using cyber decoys
- Unauthenticated attackers are bypassing Cisco ISE’s management interface (CVE-2026-76460)
- Scammers leave AI fingerprints all over fake antivirus renewal page