CVE-2026-93643

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Path Traversal in OnlyOffice Document Editing

Publication date: 2026-09-25

Last updated on: 2026-09-29

Assigner: Rapid7, Inc.

Description

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-25

Last Modified

2026-09-29

Generated

2026-10-16

AI Q&A

2026-09-25

EPSS Evaluated

2026-10-14

NVD

CVE-2026-93643

EUVD

EUVD-2026-87101

Affected Vendors & Products

Vendor	Product	Version / Range
zimbra	zimbra	10.0.16
zimbra	zimbra	10.1.10

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-863	The product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.
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.

Attack-Flow Graph

Executive Summary

This vulnerability allows an unauthenticated remote attacker with access to a public Briefcase document in OnlyOffice/Document Editing to exploit unsigned save fields for path-traversal writes. This can lead to arbitrary command execution on the Zimbra server.

Detection Guidance

Detecting this vulnerability requires checking for path-traversal writes and command execution attempts in Zimbra systems with OnlyOffice/Document Editing enabled. Monitor logs for unsigned save field abuse in Briefcase documents. Check for unexpected file writes outside intended directories and unusual command execution patterns.

Impact Analysis

An attacker could gain full control of the Zimbra server, potentially accessing, modifying, or deleting sensitive data. This could lead to data breaches, unauthorized access to user accounts, or disruption of services.

Compliance Impact

This vulnerability could lead to non-compliance with GDPR, HIPAA, and other regulations due to unauthorized data access or exposure. Organizations may face legal penalties, reputational damage, and loss of customer trust.

Mitigation Strategies

Disable public Briefcase document access in OnlyOffice/Document Editing to prevent unauthenticated remote attackers from exploiting path-traversal writes and command execution. Ensure all save fields in documents are properly signed and validated before processing.

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