CVE-2022-41352

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload...

9.8 CriticalIn KEVPublic exploit

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: High
Availability: High

Exploit likelihood

95.5%Up 94.6 points since Sep 26, 2022

What each source reports

NVD Score used 9.8

Record: CVE-2022-41352
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-22
Updated: 2026-11-02

CVE List 9.8

Record: CVE-2022-41352
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-22
Updated: 2026-11-02

EUVDEUVD-2022-44557 9.8

Record: EUVD-2022-44557
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

GitHub AdvisoriesGHSA-85q4-vgvj-3q28 9.8

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload...

An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavisd 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, amavisd automatically prefers it over cpio.

Record: GHSA-85q4-vgvj-3q28
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness: CWE-22, CWE-434
Updated: 2026-11-02

CISA KEV No score

Synacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

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

Record: CVE-2022-41352
Weakness: CWE-22
Updated: 2026-11-02

OSV 9.8

Record: CVE-2022-41352
CVSS 3.1: 9.8 CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated: 2026-11-02

Affected products

Public exploits

Links only. Every CVE stores no exploit code.

Public exploits
Source	Link	Date
Metasploit	TAR Path Traversal in Zimbra (CVE-2022-41352)	2022-06-28
PoC in GitHub	segfault-it/cve-2022-41352	2022-10-10
PoC in GitHub	Cr4ckC4t/cve-2022-41352-zimbra-rce	2022-11-11
PoC in GitHub	dafrax/cve-2022-41352-zimbra-rce	2023-12-10
Nuclei	Zimbra Collaboration - Unrestricted File Upload

History

History
Recorded	Changed	Sources
Nov 3, 2026	exploitation, exploits
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, Nuclei, NVD, OSV, PoC in GitHub

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2022-41352 is a critical vulnerability (CVSS 9.8) in Synacor Zimbra Collaboration Suite (zcs), published September 26, 2022. CISA lists it as known to be exploited, since October 20, 2022. EUVD reports exploitation since October 20, 2022. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 95.5%, the 99th percentile. No source names a fixed version.