# CVE-2022-41352: Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

Source: https://junglewise.ai/threats/cve-2022-41352-synacor-zimbra-collaboration-suite-zcs-arbitrary-file-upload  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-10-20. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2022-41352 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2022-10-20

Synacor Zimbra Collaboration Suite (ZCS) is vulnerable to arbitrary file upload via a cpio loophole in the amavis component. An attacker can bypass security controls to extract files to the webapp directory, potentially gaining unauthorized access to user accounts. This issue occurs when the pax utility is missing, causing the system to fall back to cpio.

Technologies: [Synacor Zimbra Collaboration Suite (ZCS)](https://junglewise.ai/threats/technologies/zimbra-collaboration-suite-zcs). Vendors: [Synacor](https://junglewise.ai/threats/vendors/synacor).

## Quick answers

**Is CVE-2022-41352 exploited in the wild?** Yes. CVE-2022-41352 is known to be exploited in the wild, first recorded on 20 October 2022. Treat it as urgent.

**How severe is CVE-2022-41352?** Critical severity, with a CVSS score of 9.8, published 20 October 2022.

**Which products and versions are affected?** Synacor Zimbra Collaboration Suite (ZCS) 8.8.15, 9.0.0.

**Is there a fix for CVE-2022-41352?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2022-41352 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2022-41352?** Check whether you run Synacor Zimbra Collaboration Suite (ZCS). Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Synacor Zimbra Collaboration Suite (ZCS) 8.8.15, 9.0.0

## Timeline

- 2022-10-20: disclosed
- 2022-10-20: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2022-10-20: exploited: Reported as exploited in the wild

## Related threats

- [Zimbra Collaboration Suite OS command injection in SMTP](https://junglewise.ai/threats/cve-2026-73570-zimbra-collaboration-suite-os-command-injection-in-smtp)
- [Synacor Zimbra Collaboration Suite XSS in Classic UI](https://junglewise.ai/threats/cve-2025-48700-synacor-zimbra-collaboration-suite-xss-in-classic-ui)
- [Synacor Zimbra Collaboration Suite stored XSS in Classic UI](https://junglewise.ai/threats/cve-2025-66376-synacor-zimbra-collaboration-suite-stored-xss-in-classic-ui)
- [Synacor Zimbra Collaboration Suite file inclusion in RestFilter servlet](https://junglewise.ai/threats/cve-2025-68645-synacor-zimbra-collaboration-suite-file-inclusion-in-restfilter)
- [Synacor Zimbra Collaboration Suite XSS in Classic Web Client](https://junglewise.ai/threats/cve-2025-27915-synacor-zimbra-collaboration-suite-xss-in-classic-web-client)