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U.S. CISA adds Zimbra Collaboration Suite (ZCS) flaw to its Known Exploited Vulnerabilities catalog
U. S. Cybersecurity and Infrastructure Security Agency (CISA) adds Zimbra Collaboration Suite (ZCS) flaw to its Known Exploited Vulnerabilities catalog. The U. S. Cybersecurity and Infrastructure Security Agency (CISA) added the Zimbra Collaboration Suite (ZCS) flaw CVE-2026-73570 to its Known Exploited Vulnerabilities (KEV) catalog . CERT Polska, Poland’s national computer emergency response team, confirmed this week that threat actors are actively exploiting the critical vulnerability in Zimbra Collaboration Suite. The flaw allows unauthenticated remote code execution and was patched less than a month ago. “The CERT Polska team informs about an actively exploited OS Command Injection vulnerability in Zimbra Collaboration Suite.” reads the advisory published by CERT Polska.
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.
Poland’s CERT Warns of Active Exploitation of Critical Zimbra Collaboration Suite Flaw
CERT Polska confirmed active exploitation of CVE-2026-73570, a critical unauthenticated RCE in Zimbra Collaboration Suite patched on July 20. CERT Polska, Poland’s national computer emergency response team, confirmed this week that threat actors are actively exploiting a critical vulnerability in Zimbra Collaboration Suite tracked as CVE-2026-73570. The flaw allows unauthenticated remote code execution and was patched less than a month ago. “The CERT Polska team informs about an actively exploited OS Command Injection vulnerability in Zimbra Collaboration Suite.” reads the advisory published by CERT Polska. “The vulnerability, identified as CVE-2026-73570 , allows an unauthenticated attacker to execute arbitrary shell commands with the privileges of the zimbra user .
CVE-2026-73570 - Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
Zimbra Collaboration Suite (ZCS) contains an OS command injection vulnerability which could allow an unauthenticated attacker to send specially crafted SMTP requests that may result in execution of arbitrary operating system commands as the Zimbra user.
Hackers Target Zimbra Servers in Active Exploitation Campaign
Exploitation of the Zimbra Collaboration vulnerability CVE-2026-73570 has been observed by Poland’s CERT Polska. The post Hackers Target Zimbra Servers in Active Exploitation Campaign appeared first on SecurityWeek .
Attackers Exploit Zimbra SNMP Flaw for Unauthenticated Remote Code Execution
A now-patched security flaw impacting Zimbra Collaboration (ZCS) has come under active exploitation in the wild, according to the Polish Computer Emergency Response Team (CERT Polska). The vulnerability in question is CVE-2026-73570 (CVSS score: 8.9), which refers to a case of command injection that can lead to remote code execution. "A remote code execution vulnerability exists in Zimbra
CVE-2026-73570 - National Institute of Standards and Technology (.gov)
CVE-2026-73570 National Institute of Standards and Technology (.gov)
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