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CVE-2022-37042

CriticalPublished

Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability

Published: Aug 11, 2022
Updated: Aug 4, 2026
Assigning CNA: mitre
Evidence observed: Aug 11, 2022

Primary CVSS

9.8/ 10Critical

nvd · CVSS 3.1

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS probability estimate

91.9%

High · next 30 days

Percentile: 99.8%
Model date: Oct 17, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

CISA Known Exploited

This CVE appears in the CISA Known Exploited Vulnerabilities catalog.

Summary

Zimbra Collaboration Suite (ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. By bypassing authentication (i.e., not having an authtoken), an attacker can upload arbitrary files to the system, leading to directory traversal and remote code execution. NOTE: this issue exists because of an incomplete fix for CVE-2022-27925.

Sources

Repository evidence: Files: 2 · Repositories: 2

1 Module1 Template

Zip Path Traversal in Zimbra (mboximport) (CVE-2022-27925)Module
modules/exploits/linux/http/zimbra_mboximport_cve_2022_27925.rb
Metasploit Framework modules
ExploitEvidence observed: Sep 26, 2026Revision: b22ce1fbae63Related tool
Declared conditions
- platform: Linux($.exploit_linux/http/zimbra_mboximport_cve_2022_27925.platform)
- verification: check_not_declared($.exploit_linux/http/zimbra_mboximport_cve_2022_27925.check)
Zimbra Collaboration Suite 8.8.15/9.0 - Remote Code ExecutionTemplate
http/cves/2022/CVE-2022-37042.yaml
Nuclei Templates
DetectionEvidence observed: Sep 26, 2026Revision: 17f5725dc10cRelated tool
Declared conditions
- network: http($.protocol_keys)
- verification: dsl($.matchers[*].type)

CVE-2022-37042Exploit
CVE-2022-37042 Zimbra Auth Bypass leads to RCE
CVE-2022-37042Exploit
Zimbra CVE-2022-37042 Nuclei weaponized template
Zimbra_CVE-2022-37042-_CVE-2022-27925Exploit
Exploit for Zimbra Collaboration Suite vulnerabilities CVE-2022-37042 and CVE-2022-27925, enabling unauthenticated remote code execution and file upload bypass for security testing.
ZimbraResearch
CVE-2022-27925
CVE-2022-27925Exploit
PoC

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