CVE-2026-102139

Kiteworks Email Protection Gateway Incorrect Authorization

Published Sep 30, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Accellion
Accellion kiteworks
CPEs cpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:*
Vendors & Products Accellion
Accellion kiteworks
Type Values Removed Values Added
First Time appeared Kiteworks
Kiteworks kiteworks Email Protection Gateway
Vendors & Products Kiteworks
Kiteworks kiteworks Email Protection Gateway
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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.
Title Kiteworks Email Protection Gateway Incorrect Authorization
Weaknesses CWE-639
CWE-863
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisa-cg
Published
Updated
Oct 1, 2026, 1:37 PM
Reserved
Sep 28, 2026, 5:39 PM
Status
Analyzed
Published
Sep 30, 2026, 9:17 PM
Modified
Oct 7, 2026, 3:01 PM