Microsoft warns of new Defender zero-days exploited in attacks

Published on May 21, 2026

On Wednesday, Microsoft started rolling out security patches for two Defender vulnerabilities that have been exploited in zero-day attacks. [...]

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9-Year-Old Linux Kernel Flaw Enables Root Command Execution on Major Distros

May 21, 2026
Cybersecurity researchers have disclosed details of a vulnerability in the Linux kernel that remained undetected for nine years.The vulnerability, tracked as CVE-2026-46333 (CVSS score: 5.5), is a case of improper privilege management that could permit an unprivileged local user to disclose sensitive files and execute arbitrary commands as root on default installations of several major

When Identity is the Attack Path

May 21, 2026
Consider a cached access key on a single Windows machine. It got there the way most cached credentials do - a user logged in, and the key stored itself automatically. Standard AWS behavior. No one misconfigured anything or violated a policy. Yet that single key, which was easily accessible to a minor-league attacker, could have opened a path to some 98% of entities in the company's cloud