CVE-2026-93643

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.

Overview

State: PUBLISHED
Assigner (CNA): rapid7
CVSS severity: CRITICAL
CVSS score: 9.8 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score: 9.8 / 10 CRITICAL source: CNA overview
CWE(s): CWE-22, CWE-863
Reserved: 2026-09-18
Published: 2026-09-25 13:57 UTC
Last updated: 2026-09-25 16:10 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/93xxx/CVE-2026-93643.json
Linked Threat: CVE-2026-93643 — Zimbra Collaboration Suite OnlyOffice Integration Path Traversal Leading to Remote Code Execution via Unauthenticated /downloadas Request

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Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-09-25 14:17:23 UTC
NVD last modified: 2026-09-26 04:17:51 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: cve@rapid7.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 10

Affected products (1)

Vendor	Product	Versions	Platforms
Zimbra	Zimbra Collaboration Suite (ZCS)	`0` (affected)	—

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories vendor-advisory

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories cve@rapid7.com

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-93643.json.

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