CVE-2022-41352
CriticalExploitedPublic exploitAn 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.
Published Sep 25, 2022 · Updated Sep 14, 2026
Key Facts
Patch immediately- CVE-2022-41352 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Zimbra Collaboration Suite (Synacor).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 20, 2022 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 95% probability of exploitation in the next 30 days.
- No fixed version is listed yet; check the vendor advisory for mitigations.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
95%
Higher than 99.8% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-41352 brief as a PDF
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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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 20, 2022 | Nov 10, 2022 | Known |
| Industry KEV feed | Oct 20, 2022 | Nov 10, 2022 | Known |
| CIRCL KEV | Oct 20, 2022 | Nov 10, 2022 | Not reported |
| ENISA EUVD | Oct 20, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
63 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Zimbra Collaboration SuiteSynacor | 8.8.15, 8.8.15-p1, 8.8.15-p10, 8.8.15-p11, 8.8.15-p12, 8.8.15-p13, 8.8.15-p14, 8.8.15-p15 | n/a |
Timeline
Publicly disclosed
Sep 25, 2022
Added to CISA KEV
Oct 20, 2022
Added to Industry KEV feed
Oct 20, 2022
Added to CIRCL KEV
Oct 20, 2022
Added to ENISA EUVD
Oct 20, 2022
Last updated
Sep 14, 2026
Weakness Type
- CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
References
- advisoryhttps://forums.zimbra.org/viewtopic.php?t=71153&p=306532
- advisoryhttps://github.com/CVEProject/cvelistV5/tree/main/cves/2022/41xxx/CVE-2022-41352.json
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-41352
- advisoryhttps://wiki.zimbra.com/wiki/Zimbra_Security_Advisories
- advisoryhttps://www.secpod.com/blog/unpatched-rce-bug-in-zimbra-collaboration-suite-exploited-in-wild/
FAQ
Common Questions.
An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0.
Affected: Zimbra Collaboration Suite (Synacor) versions 8.8.15, 8.8.15-p1, 8.8.15-p10, 8.8.15-p11, 8.8.15-p12, 8.8.15-p13, 8.8.15-p14, 8.8.15-p15. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 20, 2022 and is known to be used in ransomware campaigns.
Yes. It was added on Oct 20, 2022 with a federal remediation due date of Nov 10, 2022.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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