Deserialization Vulnerability in Kiteworks Email Protection Gateway
CVE-2026-102108

7.2HIGH

Key Information:

Vendor

Kiteworks

Status
Email Protection Gateway
Vendor
CVE Published:
30 September 2026

What is CVE-2026-102108?

An authenticated administrator of Kiteworks Email Protection Gateway may exploit a deserialization vulnerability by submitting a specially crafted serialized object through the cluster management interface. This issue arises due to insufficient validation during the deserialization process, potentially allowing an attacker to execute arbitrary code with the privileges of the gateway service account. The exploitation requires specific queue-management privileges assigned to the administrator account, heightening the risk of unauthorized access and control over the gateway.

Affected Version(s)

Email Protection Gateway 0 < 9.5.0

Email Protection Gateway 9.5.0

References

https://github.com/kiteworks/security-advisories/security...
vendor-advisory
https://raw.githubusercontent.com/cisagov/CSAF/develop/cs...
third-party-advisory

CVSS V3.1

Score:
7.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Icare, https://yeswehack.com/hunters/icare
Supr4s, https://yeswehack.com/hunters/Supr4s
wlayzz, https://yeswehack.com/hunters/wlayzz
truff, https://yeswehack.com/hunters/truff
.