Vulnerability · Published Sep 30, 2026 · Assigned by cisa-cg

CVE-2026-102131Kiteworks Email Protection Gateway Improper Handling of Case Sensitivity

High 7.2

In plain English

A high-severity code injection in Email Protection Gateway from Kiteworks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 68% of all known vulnerabilities).

Severity (CVSS 3.1)7.2High

Exploit odds (30 days)1.2%top 32.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Kiteworks Email Protection Gateway rejected certain configuration settings, but its validation did not recognize every form in which they could be supplied. An authenticated administrator could potentially use an unrecognized form to have a file of their choosing written to the gateway and executed, resulting in code execution as the gateway service account.

Affected products (as reported)

Vendor	Product	Versions
Kiteworks	Email Protection Gateway	0 – before 9.5.0

Weakness: CWE-94, CWE-178 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

References

url vendor-advisory
url third-party-advisory