Quick answers
- Is CVE-2026-102135 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-102135 being exploited in the wild.
- How severe is CVE-2026-102135?
- Medium severity, with a CVSS score of 6.6, published 30 September 2026.
- Which products and versions are affected?
- Kiteworks Email Protection Gateway before 9.5.1.
- Is there a fix for CVE-2026-102135?
- A patch was published on 2026-09-30: version 9.5.1 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-102135 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-102135?
- Check whether you run Kiteworks Email Protection Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
The vulnerability exists in the deserialization of crafted serialized objects within clustered deployments when database replication is active. An attacker must control a trusted cluster peer or possess administrative access to the appliance to submit malicious payloads. Successful exploitation leads to arbitrary code execution as the gateway service account; the issue is resolved in version 9.5.1 and later.
Affected products
- Kiteworks Email Protection Gateway before 9.5.1
Timeline
- 2026-09-30: disclosed
- 2026-09-30: patched: version 9.5.1