CVE-2022-37042
Synacor Zimbra Collaboration Suite (ZCS) Authentication Bypass Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 11 Aug 2022
- Used in ransomware campaigns
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.
Key facts
- Published
- 11 Aug 2022
- Last changed
- 4 Aug 2026
- Assigned by
- mitre
- KEV added
- 11 Aug 2022
- KEV fix due
- 1 Sep 2022
- Used in ransomware
- Yes, according to CISA
- EPSS
- 92.072% likely to be exploited in the next 30 days, higher than 99.824% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | n/a |
|
Timeline
- 11 Aug 2022 CVE-2022-37042 added to CISA KEV
- 11 Aug 2022 Added to the CISA KEV catalogue
- 11 Aug 2022 Published
Weakness
Practice this bug class
HackZoneLabs has a hands-on lab on Path traversal (CWE-22).