CVE-2026-102135
6.6 · MEDIUMOn 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 v…
Overview
CVE-2026-102135 is a medium-severity vulnerability affecting accellion kiteworks. It was published on September 30, 2026 and has a CVSS 3.1 base score of 6.6 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 6.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
Technical 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
Check the references section for vendor advisories and patches from accellion. Update kiteworks to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| accellion | kiteworks | >= 0, < 9.5.1 | Affected |
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Frequently asked questions
What is CVE-2026-102135?
CVE-2026-102135 is a medium-severity vulnerability affecting accellion kiteworks. It was published on September 30, 2026 and has a CVSS 3.1 base score of 6.6 (MEDIUM).
How severe is CVE-2026-102135?
This vulnerability has a CVSS 3.1 base score of 6.6, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2026-102135?
Check the references section for vendor advisories and patches from accellion. Update kiteworks to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-102135?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-102135 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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