Vulnerability · Published Sep 30, 2026 · Assigned by cisa-cg

CVE-2026-102108Kiteworks Email Protection Gateway deserialization of untrusted data

High 7.2

In plain English

A high-severity unsafe deserialization in Email Protection Gateway from Kiteworks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.5% (higher than 74% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)1.5%top 26.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

An authenticated administrator of Kiteworks Email Protection Gateway could submit a crafted serialized object to a cluster management interface that was deserialized without sufficient validation, potentially allowing arbitrary code execution in the context of the gateway service account. Exploitation requires an administrator account holding a specific queue-management privilege.

Affected products (as reported)

Vendor	Product	Versions
Kiteworks	Email Protection Gateway	0 – before 9.5.0

Weakness: CWE-502 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

url vendor-advisory
url third-party-advisory