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CVE-2026-93643

Zimbra Collaboration Suite (ZCS) · remote code execution

CVSS 3.1 9.8 CRITICALCheck source for fixed versionsKEV status unknown

Original advisory

Historical advisory recorded 23 Oct 2026 15:48:27 UTC. Read the latest advisory.

cve-program · CVE-2026-93643

Published

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.

Read the publisher's advisory

Affected versions, risk and source history

cve-program · CVE-2026-93643

Published

Zimbra Collaboration Suite (ZCS)

Vendor product

Publisher's version information

Shown as published. These rules are not interpreted as NuGet package version ranges.

{
                    "vendor": "Zimbra",
                    "product": "Zimbra Collaboration Suite (ZCS)",
                    "versions": [
                        {
                            "status": "affected",
                            "version": "0",
                            "lessThan": "10.1.21",
                            "versionType": "semver"
                        }
                    ],
                    "defaultStatus": "unaffected"
                }

Original source record · Cite this exact observation · Complete original publisher JSON