CVE-2026-102139
Kiteworks Email Protection Gateway Incorrect Authorization
CVSS Score
6.5
EPSS Score
0.0%
EPSS Percentile
0th
An authorization check in the large file exchange feature of Kiteworks Email Protection Gateway did not correctly establish that the requesting user was a party to the package being requested. An authenticated user of that optional feature could read the subject, message body, and attachments of packages they neither sent nor received.
| CWE | CWE-639 CWE-863 |
| Vendor | kiteworks |
| Product | email protection gateway |
| Published | Sep 30, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
Affected Versions
Kiteworks / Email Protection Gateway
0 < 9.5.1