CVE-2026-93643 — CRITICAL (9.8)

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-863 CWE-22

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

FAQ

What is CVE-2026-93643?

CVE-2026-93643 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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-traversa...

How severe is CVE-2026-93643?

CVE-2026-93643 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-93643?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.