CVE-2026-93643 json
Zimbra Collaboration Suite OnlyOffice Integration Path Traversal Leading to Remote Code Execution via Unauthenticated /downloadas Request
published last mo. modified last mo. also EUVD-2026-87101
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 61%
- public exploits
- 0
- none known
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.
Patch / fix
- Zimbra Zimbra Collaboration Suite (ZCS) 10.1.21
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- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- last mo.
Exploit prediction
0.96% chance of exploitation in the next 30 days, higher than 61% of all scored CVEs (FIRST EPSS, 2026-11-11).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- Zimbra Zimbra Collaboration Suite (ZCS)
Classification
References
-
wiki.zimbra.com
/wiki/Zimbra_Security_Advisories
vendor-advisory
Sources
- CVE List CVE-2026-93643
- NVD CVE-2026-93643
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