CISA added CVE-2026-73570, an OS Command Injection vulnerability in Zimbra Collaboration Suite (ZCS), to its Known Exploited Vulnerabilities (KEV) Catalog based on confirmed active exploitation. The vulnerability allows attackers to execute arbitrary OS commands on affected hosts. BOD 26-04 requires FCEB agencies to remediate KEV-listed vulnerabilities on exposed assets and to investigate whether systems were compromised prior to patching.
CVE-2026-73570
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CISA Adds One Known Exploited Vulnerability to Catalog (CVE-2026-73570)