CVE-2022-41352: in the CISA KEV catalogue
Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability. CISA added CVE-2022-41352 to the Known Exploited Vulnerabilities catalogue on 2022-10-20 with a default due date of 2022-11-10. Known ransomware campaign use: Known. Forensic triage flag: No.
Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts. (CISA description)
- Vendor / product
- Synacor Zimbra Collaboration Suite (ZCS)
- CWE
- CWE-22
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 95%, percentile 99 (scored 2026-11-03)
EPSS puts about 95 in 100 odds (95%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 99% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2022-41352 in the CISA KEV catalogue?
Yes. CISA added CVE-2022-41352 (Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2022-10-20. CISA's default due date for it is 2022-11-10.
Is CVE-2022-41352 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2022-41352.
What should I do about CVE-2022-41352?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2022-41352