Description
An authorization bypass in the EWS FindItem handler of Zimbra Collaboration Suite 10.1.0 through 10.1.19 allows an authenticated user with EWS enabled to read complete mailbox items, including raw MIME and attachments, from arbitrary local accounts without a share or delegation grant.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Zimbra | Zimbra Collaboration Suite | < 10.1.20 | 10.1.20 |
Advisories 1
- WID-SEC-2026-2429 Synacor Zimbra: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 25, 2026
References
- https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories vendor-advisory