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TI-2026-63080 Aliases CVE-2026-93643GHSA-4g2j-34p9-p684

Path traversal in Zimbra Collaboration Suite

Priority MEDIUM 51CWE-22Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0096 61st percentileScored 2026-11-07
Fix Fixed Zimbra Collaboration Suite (ZCS) (Zimbra): 10.1.21

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ZimbraZimbra Collaboration Suite (ZCS)before 10.1.2110.1.21Patch availableCNA
  • Zimbra Collaboration Suite (ZCS) VendorZimbra Affected before 10.1.21 Fixed in 10.1.21 Patch available CNA

Remediation

  • Fix · CNA Zimbra Collaboration Suite (ZCS) (Zimbra) Fixed in 10.1.21

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Zimbra Collaboration Suite (ZCS) 10.1.21

    4 records Highest priority Priority MEDIUM 4 MEDIUM

    Other records, highest priority first

    • TI-2026-63078 Zimbra Collaboration Suite Classic Web Client Stored Cross-Site Scripting via Forged Share InvitationPriority MEDIUM 42
    • TI-2026-63081 Cross-site scripting in Zimbra Collaboration SuitePriority MEDIUM 41
    • TI-2026-63079 Zimbra Collaboration Suite Modern Web Client Stored Cross-Site Scripting via Forged Share InvitationPriority MEDIUM 41
    Show all 4 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-93643
  2. 2026-10-03 Alias added: GHSA-4g2j-34p9-p684

References

Advisory 1

  • TI-2026-51660 OS command injection in Zimbra Collaboration KEVCVSS 3.1HIGH 8.9
  • TI-2025-40820 Cross-site scripting in Zimbra Collaboration KEVCVSS 3.1HIGH 7.2
  • TI-2024-18266 An issue was discovered in Zimbra Collaboration (ZCS) 9.0 and 10.0. KEVCVSS 3.1MEDIUM 6.1
  • TI-2024-30553 An issue was discovered in Zimbra Collaboration (ZCS) 10.1.x before 10.1.1, 10.0.x before… CVSS 3.1HIGH 8.8
  • TI-2022-13998 Zimbra Collaboration Open Source 8.8.15 does not encrypt the initial-login randomly… CVSS 3.1CRITICAL 9.8
  • TI-2023-13772 An issue in Zimbra Collaboration ZCS v.8.8.15 and v.9.0 allows an attacker to execute… CVSS 3.1CRITICAL 9.8
See all 94 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences