Is CVE-2026-102127 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-102127 being exploited in the wild.

How severe is CVE-2026-102127?

High severity, with a CVSS score of 7, published 30 September 2026.

Which products and versions are affected?

Kiteworks Email Protection Gateway before 9.5.1.

Is there a fix for CVE-2026-102127?

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-2026-102127 attacked?

It is attacked over the network.

Am I affected by CVE-2026-102127?

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-2026-102127: Kiteworks Email Protection Gateway XXE in XML parser

CVE-2026-102127 · Severity: high · CVSS 7 · Published 2026-09-30

Kiteworks Email Protection Gateway contains an XML external entity (XXE) vulnerability in its message parser. When an optional, non-default message-processing feature is enabled, an unauthenticated attacker can send a crafted email to read sensitive files like encryption keys and credentials from the gateway system, and exfiltrate them to an attacker-controlled destination.

Technologies: Kiteworks Email Protection Gateway. Vendors: Kiteworks.

Quick answers

Is CVE-2026-102127 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-102127 being exploited in the wild.
How severe is CVE-2026-102127?: High severity, with a CVSS score of 7, published 30 September 2026.
Which products and versions are affected?: Kiteworks Email Protection Gateway before 9.5.1.
Is there a fix for CVE-2026-102127?: 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-2026-102127 attacked?: It is attacked over the network.
Am I affected by CVE-2026-102127?: 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 XML parser in Kiteworks EPG fails to restrict external entity references, allowing XXE attacks. The vulnerability requires an optional non-default message-processing feature to be enabled and can be exploited remotely without authentication or user interaction. A successful exploit allows arbitrary file read on the gateway service account, potentially exposing cryptographic keys, credentials, and other sensitive data.

Affected products

Kiteworks Email Protection Gateway before 9.5.1

Timeline

2026-09-30: disclosed
2026-09-30: patched: version 9.5.1

References

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