EUVD Vulnerability Catalog

EUVD-2026-87101

Severity: CRITICAL Base Score: 9.8 CVSS Version: 3.1

Vulnerability 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 Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

▪ Attack Vector (AV): Network

▪ Attack Complexity (AC): Low

▪ Privileges Required (PR): None

▪ User Interaction (UI): None

▪ Scope (S): Unchanged

▪ Confidentiality Impact (C): High

▪ Integrity Impact (I): High

▪ Availability Impact (A): High

Affected Vendors & Systems

Vendor Zimbra

References & Advisory Links

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

rapid7

EPSS Probability

Known Aliases

GHSA-4g2j-34p9-p684 CVE-2026-93643

Published On

2026-09-25

Last Updated

2026-09-26