CVE-2026-102135

Kiteworks Email Protection Gateway Deserialization of Untrusted Data

MEDIUM
6.6
CVSS Score
Published: September 30, 2026 at 08:12 PM UTC
Updated: October 8, 2026 at 01:45 PM UTC
2 products affected across 2 vendorsKiteworksEmail Protection Gateway

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Severity
MEDIUM6.6
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

0 ≤ v < 9.5.10
Vendor states this is fixed in 9.5.1 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.6MEDIUMcisa-cg
Attack Vector
NETWORK
Complexity
HIGH
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-502

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