Weekly Cybersecurity Briefing (20 October – 26 October 2025)
A week marked by widespread cloud disruption, active exploitation of critical server flaws, and an escalation in developer supply‑chain threats.
AWS experienced a DNS and load‑balancer outage that disrupted major consumer and developer services and spurred opportunistic phishing campaigns.
CISA added multiple actively exploited vulnerabilities to its Known Exploited Vulnerabilities catalogue, including a Windows SMB privilege escalation and Adobe/Oracle issues.
A critical WSUS deserialisation flaw (CVE‑2025‑59287) was patched after proof‑of‑concept exploits and active attacks were reported.
Developer supply‑chain risks intensified as GlassWorm self‑propagating malware and TARmageddon tar‑parser flaws targeted extension ecosystems and libraries.
State‑linked espionage and ransomware activity continued, with new toolkits and resurgent RaaS operations observed across multiple campaigns.