What is CVE-2022-41352?

CVE-2022-41352 is a critical-severity vulnerability in Synacor Zimbra Collaboration Suite, classified under Path Traversal. CVSS score: 9.8/10. Published 2022-09-26.

How severe is CVE-2022-41352?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2022-41352 known to be exploited?

Yes. CVE-2022-41352 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-10-20), indicating it is being actively exploited. 25 public proof-of-concept repositories are indexed.

Path Traversal in Synacor Zimbra Collaboration Suite

CVE-2022-41352

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also, pax is in the prerequisites of Zimbra on Ubuntu; however, pax is no longer part of a default Red Hat installation after RHEL 6 (or CentOS 6). Once pax is installed, amavis automatically prefers it over cpio.

Vulnerability class: Path Traversal (Directory Traversal)

Published 2022-09-26 · last modified 2026-09-10.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.955 (99.9th percentile), scored 2026-10-19.

Very high probability of exploitation in the next 30 days — among the top 0.1% most-likely-to-be-exploited CVEs. 100th percentile — 99.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.955 · newest: 0.955 · change: 0.000

Affected products

Synacor Zimbra Collaboration Suite — versions 9.0.0, 8.8.15

Weakness classification (CWE)

CWE-22 — Path Traversal

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-10-20. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-11-10.

Required action: Apply updates per vendor instructions.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

wiki.zimbra.com/wiki/Zimbra_Security_Advisories (Vendor Advisory)
wiki.zimbra.com/wiki/Security_Center (Patch, Release Notes, Vendor Advisory)
forums.zimbra.org/viewtopic.php (Mitigation, Vendor Advisory)
packetstormsecurity.com/files/169458/Zimbra-Collaboration-Suite-TAR-Path-Traver… (Exploit, VDB Entry, Third Party Advisory)
www.secpod.com/blog/unpatched-rce-bug-in-zimbra-collaboration-suite-exploited-i… (Third Party Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2022-41352?: CVE-2022-41352 is a critical-severity vulnerability in Synacor Zimbra Collaboration Suite, classified under Path Traversal. CVSS score: 9.8/10. Published 2022-09-26.
How severe is CVE-2022-41352?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2022-41352 known to be exploited?: Yes. CVE-2022-41352 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-10-20), indicating it is being actively exploited. 25 public proof-of-concept repositories are indexed.