CVE-2026-10631 — Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item Identifier

CVE-2026-10631

Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item Identifier PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Zimbra / Zimbra Collaboration Suite	affected 0 before 10.1.20

CWE

CWE-639

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.