https://defend.network/briefings/signal-phishing-linux-kernel-aws-credential-theft-2026-06-27.html defend.network en 2026-06-27T06:30:00Z Signal backup keys targeted; Linux kernel RCE; AWS Q credential theft https://defend.network/briefings/lantronix-eds5000-cisco-sd-wan-cordyceps-github-2026-06-25.html defend.network en 2026-06-25T06:30:00Z Critical Lantronix flaw actively exploited; Cisco SD-WAN zero-day; 27M credentials recovered