Zimbra Collaboration Suite up to 10.1.20 OnlyOffice path traversal

Summaryinfo

A vulnerability classified as very critical has been found in Zimbra Collaboration Suite up to 10.1.20. This affects an unknown part of the component OnlyOffice. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-93643. It is possible to initiate the attack remotely. There is no exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Zimbra Collaboration Suite up to 10.1.20 and classified as very critical. Affected by this vulnerability is some unknown processing of the component OnlyOffice. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

When OnlyOffice/Document Editing is available, an unauthenticated remote attacker with access to an existing supported public Briefcase document can abuse unsigned save fields to perform path-traversal writes and execute commands as zimbra.

The advisory is shared at wiki.zimbra.com. This vulnerability is known as CVE-2026-93643 since 09/18/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/25/2026). MITRE ATT&CK project uses the attack technique T1006 for this issue.

Upgrading to version 10.1.21 eliminates this vulnerability.

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Productinfo

Type

• Groupware Software

Vendor

• Zimbra

Name

• Collaboration Suite

Version

• 10.1.0
• 10.1.1
• 10.1.2
• 10.1.3
• 10.1.4
• 10.1.5
• 10.1.6
• 10.1.7
• 10.1.8
• 10.1.9
• 10.1.10
• 10.1.11
• 10.1.12
• 10.1.13
• 10.1.14
• 10.1.15
• 10.1.16
• 10.1.17
• 10.1.18
• 10.1.19
• 10.1.20

CPE 2.3info

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CPE 2.2info

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Entryinfo

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