CVE-2022-27925

KEVRansomware UseSynacor Zimbra Collaboration Suite (ZCS) Arbitrary File Upload Vulnerability

Description

Synacor Zimbra Collaboration Suite (ZCS) contains flaw in the mboximport functionality, allowing an authenticated attacker to upload arbitrary files to perform remote code execution. This vulnerability was chained with CVE-2022-37042 which allows for unauthenticated remote code execution.

Zimbra Collaboration (aka ZCS) 8.8.15 and 9.0 has mboximport functionality that receives a ZIP archive and extracts files from it. An authenticated user with administrator rights has the ability to upload arbitrary files to the system, leading to directory traversal.

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

PublishedApr 21, 2022

Last modifiedOct 1, 2026

Added to KEVAug 11, 2022

Remediation dueSep 1, 2022

References

packetstormsecurity.com/files/168146/Zimbra-Zip-Path-Traversal.htmlExploitThird Party Advisory
wiki.zimbra.com/wiki/Security_CenterVendor Advisory
wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P24Release NotesVendor Advisory
wiki.zimbra.com/wiki/Zimbra_Security_AdvisoriesVendor Advisory
cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-27925US Government Resource

0 recent articles mention this CVE

Risk assessment · Critical

Actively exploited and used by ransomware crews. Patch immediately.

Exploitation: Confirmed in the wild (CISA KEV)
Federal remediation deadline: Overdue by 1518 days
Ransomware: Used in known ransomware campaigns
CVSS: 7.2 HIGH
EPSS (30-day exploit probability): 98.7% · top 1% of all CVEs
Weakness: CWE-22
Attack vector: Network, remotely reachable

Recommended actions

1.Apply updates per vendor instructions.
2.Treat as emergency change: patch or isolate internet-facing instances first.
3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
5.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.

Assessment is derived automatically from the live signals above; verify against your own asset inventory.