CVE-2026-10631CWE-639

CVE-2026-10631

Medium · published October 8, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
11.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00213 · 11.0th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-10-08T21:17Z
References (1)
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories · [email protected]
EPSS history
Timeline
  • 10 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 08 OCT 16:25Z
    Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item Identifier
    cvelistv5
  • 08 OCT 16:25Z
    Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder/Item Identifier
    cvelistv5