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CVE-2026-102135— Kiteworks Email Protection Gateway Deserialization of Untrusted Data

Quick assessment

Affected
Kiteworks Email Protection Gateway
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在启用了数据库复制的 Kiteworks 邮件防护网关集群中，被该集群信任的一方可以提交一个经过精心构造的序列化对象。由于反序列化过程中缺乏充分的验证，攻击者可能借此以网关服务账户的身份执行代码。默认情况下，复制功能是禁用的；利用此漏洞需要攻击者控制受信任的集群对等节点，或拥有该设备的管理员访问权限。

CVSS 6.6 · Medium

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution
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I. Basic Information for CVE-2026-102135

Vulnerability Information
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Vulnerability Title
Kiteworks Email Protection Gateway Deserialization of Untrusted Data
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
可信数据的反序列化
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Kiteworks Email Protection Gateway 0 ~ 9.5.1 -

II. Public POCs for CVE-2026-102135

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III. Intelligence Information for CVE-2026-102135

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Vendor Advisories for CVE-2026-102135 (1)

Other References for CVE-2026-102135 (1)

Same Patch Batch · Kiteworks · 2026-09-30 · 61 CVEs total

CVE-2026-102115 9.8 CRITICAL Kiteworks Core Authentication Bypass in the Password Reset Workflow
CVE-2026-102149 9.4 CRITICAL Kiteworks Email Protection Gateway Improper Access Control
CVE-2026-102147 9.3 CRITICAL Kiteworks Core Administrative Account Takeover through Stored Cross-site Scripting (XSS)
CVE-2026-102104 9.1 CRITICAL Kiteworks Email Protection Gateway server-side request forgery
CVE-2026-102095 9.1 CRITICAL Kiteworks Email Protection Gateway server-side request forgery
CVE-2026-102102 9.1 CRITICAL Kiteworks Email Protection Gateway server-side request forgery
CVE-2026-102105 9.1 CRITICAL Kiteworks Email Protection Gateway server-side request forgery
CVE-2026-102103 9.1 CRITICAL Kiteworks Email Protection Gateway server-side request forgery
CVE-2026-102106 9.1 CRITICAL Kiteworks Email Protection Gateway improper authentication
CVE-2026-102120 8.8 HIGH Kiteworks Core OS Command Injection
CVE-2026-102125 8.8 HIGH Kiteworks Core Sandbox Escape
CVE-2026-102092 8.7 HIGH Kiteworks Core stored XSS
CVE-2026-102100 8.7 HIGH Kiteworks Core stored XSS
CVE-2026-102121 8.6 HIGH Kiteworks Secure Data Forms Exposure of Sensitive Information to an Unauthorized Actor
CVE-2026-102126 8.1 HIGH Kiteworks Core Stored Cross-site Scripting (XSS)
CVE-2026-102101 8.1 HIGH Kiteworks Core deserialization of untrusted data
CVE-2026-102112 7.8 HIGH Kiteworks Core Local Privilege Escalation
CVE-2026-102118 7.8 HIGH Kiteworks Core before version 9.5.0 is vulnerable to Local Privilege Escalation
CVE-2026-102113 7.8 HIGH Kiteworks Core Local Privilege Escalation
CVE-2026-102143 7.5 HIGH Kiteworks Email Protection Gateway Unrestricted Upload of File with Dangerous Type

Showing top 20 of 61 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Email Protection Gateway
Same vendor: Kiteworks
Same weakness: CWE-502

V. Comments for CVE-2026-102135

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