Cybersecurity briefing, 2026-06-21

• Infected Routers Become a Hidden Scanning Fabric
• Gravity SMTP Bug Exposes Mail-Sending Credentials
• North Korea Attribution Expands Mastra Poisoning Risk
• Ransomware Hides Behind Trusted Remote Access

Recent editions

• Saturday, June 20, 2026: Gravity SMTP Bug Exposes Mail-Sending Credentials · 11 stories
• Friday, June 19, 2026: Ransomware Affiliates Rent Kernel-Grade EDR Killing · 13 stories
• Thursday, June 18, 2026: Trusted Plugin Updates Became the Payload · 17 stories
• Wednesday, June 17, 2026: Port Ransomware Reaches Through Cloud Identity · 16 stories
• Tuesday, June 16, 2026: Port Ransomware Reaches Through Cloud Identity · 19 stories
• Monday, June 15, 2026: Stolen CDN Keys Turn Plugin Scripts Into Backdoors · 8 stories
• Sunday, June 14, 2026: Splunk’s Control Plane Is Now the Target · 2 stories