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ExploitedIn CISA KEVFix available

CVE-2022-37042

Exploitation confirmed. First attested on 2022-08-11 by CISA-ADP, CISA KEV, GCVE · kevintel, GCVE · shadowserver.

  • Published2022-08-12
  • 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

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.

Timeline

dates in UTC
  1. 2022-08-11Added to the CISA KEV catalogCISA KEV
  2. 2022-08-11Listed as exploited by GCVEGCVE
  3. 2022-08-11Exploitation first reportedCISA KEV
  4. 2022-08-1215:15CVE publishedNVD
  5. 2025-01-2916:27SSVC 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-2022-37042?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2022-37042?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
8.8= 8.8.15no fix published
9.0= 9.0.0no 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 2022-09-01

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, unverifiedGreyNoise-Intelligence/Zimbra_CVE-2022-37042-_CVE-2022-27925aels/CVE-2022-370420xf4n9x/CVE-2022-37042
PoC-in-GitHub
Metasploit modules
1 moduleexploit/linux/http/zimbra_mboximport_cve_2022_27925rank: excellentModule metadata: Metasploit Framework, © Rapid7, Inc., BSD-3-Clause.
Metasploit Framework

CISA Known Exploited Vulnerability

Date Added
2022-08-11
Patch Due Date
2022-09-01
Ransomware Use
Known
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
2022-08-12
Last Modified
2026-08-04
NVD status
Analyzed
GitHub Advisory
GHSA-9g5r-3vrr-xfcm

Frequently asked questions

What is CVE-2022-37042?

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.

Is CVE-2022-37042 actively exploited?

Yes. CVE-2022-37042 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 2022-09-01.

What is the CVSS score for CVE-2022-37042?

CVE-2022-37042 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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