CVE-2022-37042VulnerabilityPublished 08/11/2022Updated 10/24/2026
CVE-2022-37042: Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability
Affects Synacor Zimbra Collaboration Suite (ZCS)Source CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 08/11/2022
- KEV deadline
- 09/01/2022
- Ransomware
- Used in ransomware campaigns
- EPSS
- 91.9% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply updates per vendor instructions.
Description
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.