CVE-2026-102135

Kiteworks Email Protection Gateway Deserialization of Untrusted Data

Published Sep 30, 2026 CVSS 3.1 · 6.6 Medium EPSS 1.3% KEV · Not listed
Description
On a Kiteworks Email Protection Gateway cluster with database replication enabled, a party trusted by the cluster could submit a crafted serialized object that was deserialized without sufficient validation, potentially allowing code execution as the gateway service account. Replication is disabled by default, and exploitation requires control of a trusted cluster peer or administrative access to the appliance.

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': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description On a Kiteworks Email Protection Gateway cluster with database replication enabled, a party trusted by the cluster could submit a crafted serialized object that was deserialized without sufficient validation, potentially allowing code execution as the gateway service account. Replication is disabled by default, and exploitation requires control of a trusted cluster peer or administrative access to the appliance.
Title Kiteworks Email Protection Gateway Deserialization of Untrusted Data
Weaknesses CWE-502
References
Metrics cvssV3_1

{'score': 6.6, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}

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 8, 2026, 1:45 PM