Cybersecurity briefing, 2026-05-03

Cisco firewall owners got a new instruction this week from CISA, the U.S.

• Exchange N-day Abuse Expands Espionage Reach Across Governments
• Black Shrantac Turns Perimeter Flaws Into Quiet Extortion
• PackageKit Auth Bypass Turns Local Users Root
• Patch Wave Will Expose Weak Supply Chains

Recent editions

• Saturday, May 2, 2026: Exchange N-day Abuse Expands Espionage Reach Across Governments · 18 stories
• Friday, May 1, 2026: Exchange N-day Abuse Expands Espionage Reach Across Governments · 19 stories