threat-intel
Exploits and vulnerabilities in Q1 2026
High
Summary
This Securelist report analyzes vulnerability trends and exploitation activity during Q1 2026, focusing on the expansion of exploit kits targeting Microsoft Office, Windows, and Linux operating systems. The report highlights a continued rise in registered vulnerabilities, driven by factors like AI-powered discovery and remediation efforts, alongside the exploitation of both established and newly disclosed vulnerabilities. Notably, a coordinated attack chain utilizing CVE-2026-21509, CVE-2026-21513, and CVE-2026-21514 was observed targeting Windows systems.
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