CISA Adds One Known Exploited Vulnerability to Catalog

CISA has added one new vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog , based on evidence of active exploitation.   CVE-2026-73570 Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability This type of vulnerability is a frequent attack vector for malicious cyber actors and poses significant risks to the federal enterprise. Binding Operational Directive (BOD) 26-04: Prioritizing Security Updates Based on Risk establishes vulnerability management requirements for Federal Civilian Executive Branch (FCEB) agencies. BOD 26-04 reinforces the importance of the KEV Catalog and requires federal agencies to prioritize rapid remediation of high-risk vulnerabilities,

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 →