CISA Adds Four Known Exploited Vulnerabilities to Catalog

CISA has added four new vulnerabilities to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.   CVE-2026-33824 Microsoft Internet Key Exchange (IKE) Service Extensions Double Free Vulnerability CVE-2026-55040 Microsoft SharePoint Weak Authentication Vulnerability CVE-2026-59310 Broadcom VMware vCenter Path Traversal Vulnerability   CVE-2026-65400 Apple macOS Improper Authentication Vulnerability These types of vulnerabilities are a frequent attack vector for malicious cyber actors and pose significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerab

Why it matters

Exploitation is already occurring or the issue is explicitly prioritized by defenders. Validate exposure before lower-priority patch work.

What defenders should do

Check exposure now; patch or mitigate; hunt for signs of exploitation on affected assets.

Verify at the source

CyberKit curates and prioritizes; the source remains authoritative. Read the original advisory at www.cisa.gov →