How we count
Every figure on this page is a direct count of entries in CISA’s Known Exploited Vulnerabilities catalog attributed by CISA to Synacor (KEV field vendorProject), refreshed daily. “Ransomware-linked” counts entries CISA marks as known to be used in ransomware campaigns; the remainder are “unknown” to CISA, not confirmed ransomware-free. A KEV listing means the vulnerability has been observed exploited in the wild. Snapshot as of 2026-08-31.
Exploited Synacor vulnerabilities (CISA KEV)
| CVE | Product | Vulnerability | Added | |
|---|---|---|---|---|
| CVE-2026-73570 | Zimbra Collaboration Suite (ZCS) | Zimbra Collaboration Suite (ZCS) OS Command Injection Vulnerability | 2026-08-21 | |
| CVE-2025-48700 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability | 2026-04-20 | |
| CVE-2025-66376 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting Vulnerability | 2026-03-18 | |
| CVE-2020-7796 | Zimbra Collaboration Suite | Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery Vulnerability | 2026-02-17 | |
| CVE-2025-68645 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) PHP Remote File Inclusion Vulnerability | 2026-01-22 | |
| CVE-2025-27915 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-site Scripting Vulnerability | 2025-10-07 | |
| CVE-2019-9621 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Server-Side Request Forgery (SSRF) Vulnerability | 2025-07-07 | |
| CVE-2024-27443 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2025-05-19 | |
| CVE-2023-34192 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2025-02-25 | |
| CVE-2024-45519 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Command Execution Vulnerability | 2024-10-03 | |
| CVE-2023-37580 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2023-07-27 | |
| CVE-2022-27926 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2023-04-03 | |
| CVE-2022-41352 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability | 2022-10-20 | |
| CVE-2022-27925 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability | 2022-08-11 | ransomware |
| CVE-2022-37042 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability | 2022-08-11 | ransomware |
| CVE-2022-27924 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Command Injection Vulnerability | 2022-08-04 | ransomware |
| CVE-2018-6882 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Cross-Site Scripting (XSS) Vulnerability | 2022-04-19 | ransomware |
| CVE-2022-24682 | Zimbra Collaborate Suite (ZCS) | Synacor Zimbra Collaborate Suite (ZCS) Cross-Site Scripting Vulnerability | 2022-02-25 | ransomware |
| CVE-2019-9670 | Zimbra Collaboration Suite (ZCS) | Synacor Zimbra Collaboration Suite (ZCS) Improper Restriction of XML External Entity Reference | 2022-01-10 |
← All vendors by exploited-vulnerability count
🤖 Generated by defend.network from the CISA KEV catalog. Counts are deterministic aggregates of official CISA data; verify individual advisories at the linked sources.