Risk Letters

Exploited vulnerability

CVE-2022-37042

TLP:CLEAR

Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability

Synacor Zimbra Collaboration Suite (ZCS) contains an authentication bypass vulnerability in MailboxImportServlet. This vulnerability was chained with CVE-2022-27925 which allows for unauthenticated remote code execution.

Facts

  • Vendor: Synacor
  • Product: Zimbra Collaboration Suite (ZCS)
  • CVSS: 9.8
  • EPSS (probability of exploitation within 30 days): 92.1 %
  • On CISA's Known Exploited Vulnerabilities list since: 11 August 2022
  • First known exploitation: 11 August 2022
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 1 September 2022
  • Weakness: CWE-23
  • First seen by Risk Letters: 11 August 2022

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD