Known Exploited Vulnerability

CVE-2022-41352

Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

Past federal due date 23 public exploits Added 20 Oct 2022 Due 10 Nov 2022 · 1366 days ago
VendorSynacor
ProductZimbra Collaboration Suite (ZCS)
WeaknessCWE-22
RansomwareNone confirmed

What the flaw is

Synacor Zimbra Collaboration Suite (ZCS) allows an attacker to upload arbitrary files using cpio package to gain incorrect access to any other user accounts.

Description as published by CISA. We have not independently reproduced it.

What CISA requires

Apply updates per vendor instructions.

This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.

Public exploit code

23 public repositories referencing this CVE have been catalogued on GitHub. Treat this as a strong signal to prioritise patching, not as a verified working exploit — many such repositories are scanners, write-ups or forks rather than functional code.

Showing 8 of 23. Full list in the trickest/cve dataset.

Vendor advisories

Primary sources

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Source: CISA KEV catalog · last verified August 6, 2026. Rebuilt automatically twice a day.