Tal Kollander’s history divides neatly into two halves: first as an active hacker and then as the block that stops hacks.
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Act Security Emerges from Stealth to Fight the Patch Problem
Act Security tackles the spiraling patch problem caused by AI’s ability to find new vulnerabilities in existing cloud environments.
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Hush Security Raises $30 Million for AI Agent Governance
The startup will invest in expanding engineering and sales teams, accelerating ecosystem support, and expanding corporate partnerships.
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Data breach at medical billing firm MCBS affects 1.26 million people
Healthcare billing company Medical Computer Business Services (MCBS) has disclosed that a 2025 network breach exposed the sensitive information of more than 1.2 million people. […]
Google Adopts New Threat Actor Naming System
The new two-word naming convention uses a memorable term utilized in public reporting and a cluster-categorization word.
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Critical TeamCity Flaw Could Let Attackers Run OS Commands Without Logging In
JetBrains is urging customers of on-premise versions of TeamCity to update to the latest version following the discovery of a critical security issue that could result in arbitrary code execution.
The vulnerability, assigned CVE-2026-63077 (CVSS score: 9.8), affects all TeamCity On-Premises versions. It has been addressed in versions 2025.11.7 and 2026.1.3. TeamCity Cloud instances have already
Researcher Says AI Helped Develop Linux Traffic-Control Race Into Root Exploit
STAR Labs has published a Linux kernel exploit that turns an ordinary local user into root on the CentOS Stream 9 build it targeted. The flaw, tracked as CVE-2026-53264 (CVSS score: 7.8), is a use-after-free race in the kernel’s network traffic-control subsystem.Researcher Lee Jia Jie said artificial intelligence (AI) helped him find the bug and speed up exploit development. This is local
Unpatched Fastjson Vulnerability Exploited in Attacks
The critical remote code execution bug can be exploited without authentication, under the library’s stock default configurations.
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Critical Arista VeloCloud Orchestrator Vulnerability Exploited as Zero-Day
Impacting on-premises deployments, the OS command injection allows attackers to access privileged internal functionality.
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Microsoft Says New Cybersecurity AI Model Helps MDASH Hit 95.95% at Half the Cost
Microsoft has launched its first cybersecurity-specific model inside MDASH, its multi-model vulnerability identification and remediation harness.
The company says MDASH, using MAI-Cyber-1-Flash and GPT-5.4, scored 95.95% on CyberGym. It also claims the configuration costs 50% less than its current best MDASH combination of GPT-5.4, GPT-5.4 mini, and GPT-5.3 Codex. Access is limited to approved