Paper/Archive/CVE-2026-93643

CVE-2026-93643

Zimbra Zimbra Collaboration Suite (ZCS) — Zimbra Collaboration Suite OnlyOffice Integration Path Traversal Leading to Remote Code Execution via Unauthenticated /downloadas Request

EPSS 1.0%CVSS 9.8

critical.is priorityof 100

CVSS 9.8 (CNA)9.8 / 10 × 3029.4 Not in CISA KEV+300.0 EPSS percentile 61.5.615 × 2012.3 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource

Zimbra Collaboration Suite (ZCS)< 10.1.2110.1.21CNA

Scores by source

rapid7 (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

advisorywiki.zimbra.com/wiki/Zimbra_Security_Advisories