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This donut-shaped discovery just shattered a 150-year math rule

A 150-year-old rule in geometry has been proven wrong. Mathematicians found two different doughnut-shaped surfaces that look identical when measured locally but are actually different overall. For decades, researchers suspected this might be possible but couldn’t prove it—until now. The breakthrough reshapes how mathematicians understand the relationship between local measurements and global form.
http://news.poseidon-us.com/TS95JZ

PentAGI: Open-source autonomous AI penetration testing system

Penetration testers have long relied on collections of specialized tools, manual coordination, and documented runbooks to work through a target assessment. PentAGI, an open-source project from VXControl, attempts to automate that entire workflow using a multi-agent AI system that plans, researches, and executes penetration tests with minimal human direction. How the agent system works PentAGI organizes work into a hierarchy of flows, tasks, subtasks, and actions. An orchestrator agent receives a goal and coordinates three … More → The post PentAGI: Open-source autonomous AI penetration testing system appeared first on Help Net Security.
http://news.poseidon-us.com/TS90BL

Apple Intelligence flaw kept stolen tokens reusable on another device

Apple claims that Apple Intelligence, a GenAI service provided on its operating systems, is designed with an extra focus on user security and privacy through a two-stage authentication and authorization system using anonymous access tokens. However, researchers from The Ohio State University have identified vulnerabilities in this design, demonstrated on macOS 26.0 (Tahoe), that allow attackers to steal and reuse these tokens. Service infrastructure The system offloads complex requests to cloud servers using Private Cloud … More → The post Apple Intelligence flaw kept stolen tokens reusable on another device appeared first on Help Net Security.
http://news.poseidon-us.com/TS90BC

Shadow AI, deepfakes, and supply chain compromise are rewriting the financial sector threat playbook

Financially motivated attacks continued to drive the bulk of cyber incidents against banks, insurers, and payment processors in 2025. Approximately 90% of breaches affecting financial institutions carried a financial motive, with data breaches accounting for roughly 64% of incidents and ransomware making up the remaining 36%. The average cost of a data breach in the sector reached $5.56 million per incident, placing finance second among all industries by breach cost. Personal data was the most … More → The post Shadow AI, deepfakes, and supply chain compromise are rewriting the financial sector threat playbook appeared first on Help Net Security.
http://news.poseidon-us.com/TS909T

Thunderbird 150 arrives with encrypted message search and OpenPGP improvements

Released today, Thunderbird 150.0 brings eight new features, a round of bug fixes, and security patches that cover the web engine underlying the email client. Thunderbird 150.0 runs on Windows 10 or later, macOS 10.15 or later, and Linux with GTK+ 3.14 or higher. Encrypted email gets more useful Two of the most notable additions in this release touch how users interact with encrypted mail. Thunderbird 150.0 adds message body search for OpenPGP and S/MIME … More → The post Thunderbird 150 arrives with encrypted message search and OpenPGP improvements appeared first on Help Net Security.
http://news.poseidon-us.com/TS8gRd

VirtualBox 7.2.8 is out with Linux kernel 7.0 support and crash fixes

Oracle shipped VirtualBox 7.2.8 on April 21, 2026, as a maintenance release covering crashes, networking problems, clipboard issues, and extended Linux kernel compatibility. The update touches the VMM layer, NAT networking, graphics, UEFI, and both Linux and Windows guest support. VMM and core stability A Guru Meditation error carrying the code VERR_IEM_IPE_4 is fixed in this release. The condition occurred when a guest attempted to execute the wrong hypercall instruction and injected an undefined instruction … More → The post VirtualBox 7.2.8 is out with Linux kernel 7.0 support and crash fixes appeared first on Help Net Security.
http://news.poseidon-us.com/TS8bj8

Ransomware negotiator admits role in attacks he was hired to resolve

A Florida man, formerly employed as a ransomware negotiator, pleaded guilty to conspiring to carry out ransomware attacks against US companies. Prosecutors say Angelo Martino, 41, used his position at DigitalMint, a crypto broker that helps victims negotiate and pay ransomware demands, to pass sensitive information to attackers. Alongside Martino, two more individuals were involved in the scheme: Ryan Goldberg of Georgia and Kevin Martin of Texas. All three men worked in the cybersecurity industry … More → The post Ransomware negotiator admits role in attacks he was hired to resolve appeared first on Help Net Security.
http://news.poseidon-us.com/TS8RXQ

Ivanti Neurons AI automates IT operations, reducing manual work and security risk

Ivanti has revealed new solution capabilities, focusing on enabling autonomous IT operations and organizations to secure their environments more efficiently at scale. With these advancements, Ivanti enables IT and security operations to detect, decide, and act autonomously without sacrificing trust, governance, or control. AI capabilities and the threat landscape are changing quickly, and IT and security teams are under constant pressure to keep systems secure while supporting day-to-day work. That means more devices to manage, … More → The post Ivanti Neurons AI automates IT operations, reducing manual work and security risk appeared first on Help Net Security.
http://news.poseidon-us.com/TS8Mzv