Is CVE-2026-102128 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-102128 being exploited in the wild.

How severe is CVE-2026-102128?

High severity, with a CVSS score of 7.5, published 30 September 2026.

Which products and versions are affected?

Kiteworks Email Protection Gateway before 9.5.1.

Is there a fix for CVE-2026-102128?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-102128 attacked?

It is attacked over the network, in a network appliance.

Am I affected by CVE-2026-102128?

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.

CVE-2026-102128: Kiteworks Email Protection Gateway improper authentication

CVE-2026-102128 · Severity: high · CVSS 7.5 · Published 2026-09-30

Kiteworks Email Protection Gateway, a secure email and file transfer appliance, contains an authentication weakness that allows unauthenticated remote attackers to create platform accounts and act as legitimate users without verifying their identity. An attacker could exploit this to gain control of user accounts and potentially access sensitive data transmitted through the gateway.

Technologies: Kiteworks Email Protection Gateway. Vendors: Kiteworks.

Quick answers

Is CVE-2026-102128 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-102128 being exploited in the wild.
How severe is CVE-2026-102128?: High severity, with a CVSS score of 7.5, published 30 September 2026.
Which products and versions are affected?: Kiteworks Email Protection Gateway before 9.5.1.
Is there a fix for CVE-2026-102128?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-102128 attacked?: It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-102128?: 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 is an improper authentication flaw (CWE-287) in the Email Protection Gateway's identity verification mechanism. An unauthenticated remote attacker can exploit this network-based vulnerability to spoof user identities on the Kiteworks platform and provision unauthorized accounts, resulting in loss of integrity. The issue is fixed in version 9.5.1.

Affected products

Kiteworks Email Protection Gateway before 9.5.1

Timeline

2026-09-30: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.