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ExploitedIn CISA KEVFix available

CVE-2022-41352

Exploitation confirmed. First attested on 2022-10-20 by CISA-ADP, CISA KEV, GCVE · kevintel.

  • Published2022-09-26
  • WeaknessCWE-22

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2022-09-2602:15CVE publishedNVD
  2. 2022-10-20Added to the CISA KEV catalogCISA KEV
  3. 2022-10-20Listed as exploited by GCVEGCVE
  4. 2022-10-20Exploitation first reportedCISA KEV
  5. 2025-02-0314:33SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-11-03 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2022-41352?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-41352?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Synacor zimbra collaboration suite
BranchAffectedFixed in
9.0= 9.0.0no fix published
8.8= 8.8.15no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

  1. CISA’s required action: Apply updates per vendor instructions.due 2022-11-10

Advisories and patches

Detection

read 2026-11-02 22:42 UTC
Nuclei template
available
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
3 repositories, unverifiedsegfault-it/cve-2022-41352Cr4ckC4t/cve-2022-41352-zimbra-rcedafrax/cve-2022-41352-zimbra-rce
PoC-in-GitHub
Metasploit modules
1 moduleexploit/linux/http/zimbra_cpio_cve_2022_41352rank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-10-20
Patch Due Date
2022-11-10
Ransomware Use
Unknown
Required Action
Apply updates per vendor instructions.

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2022-09-26
Last Modified
2026-09-10
NVD status
Analyzed
GitHub Advisory
GHSA-85q4-vgvj-3q28

Frequently asked questions

What is 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.

Is CVE-2022-41352 actively exploited?

Yes. CVE-2022-41352 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2022-11-10.

What is the CVSS score for CVE-2022-41352?

CVE-2022-41352 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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Sources for this record