CVE-2026-93643 Path traversal in Zimbra Collaboration Suite (ZCS)
Unauthenticated attackers can execute remote code via path traversal in Zimbra's OnlyOffice integration when document editing is enabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93643?
CVE-2026-93643 is a critical path traversal vulnerability in Zimbra Collaboration Suite (ZCS), published on 25 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-93643?
How do I fix CVE-2026-93643?
No fix has been published for CVE-2026-93643 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2026-93643 being exploited?
There is no known exploitation of CVE-2026-93643 in the wild and no public exploit code.
Sources
Also known as GHSA-4g2j-34p9-p684.