ACTIVELY EXPLOITED
CVE-2022-37042: Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability
| Vendor | Synacor |
|---|---|
| Product | Zimbra Collaboration Suite (ZCS) |
| Actively exploited | Yes |
| Added to CISA KEV | 11 Aug 2022 |
| CISA federal deadline | 1 Sep 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-23 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
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.
SOURCES
Other Synacor flaws
- CVE-2026-73570: Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability
- CVE-2025-48700: Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability
- CVE-2025-66376: Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability
- CVE-2020-7796: Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability
- CVE-2025-68645: Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.