All vulnerabilities
CVE-2026-102149GHSA-c9w5-4frw-7wqq

Kiteworks Email Protection Gateway Improper Access Control

Kiteworks Email Protection GatewayNetwork & edge
Open in ThreatlineRecord JSON
CVSS
9.4Critical
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.24%Chance of exploitation activity in the next 30 days, higher than 14% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in9.5.1Fixed versionCVE List
Published30 Sep 2026Updated 2 Oct 2026CVE List

What fixes it

  • 9.5.1Email Protection GatewayCVE List
  • 9.5.1Kiteworks Email Protection Gateway, otherGitHub

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

Kiteworks Email Protection Gateway did not sufficiently restrict which account a certificate could be assigned to. This could allow an attacker to associate a certificate with another user's account, affecting the confidentiality and integrity of that account's encrypted mail and, where certificate-based login is enabled, potentially permitting unauthorized access to the account.

Text from CVE List

Affected versions 3

  • Email Protection Gatewayaffected: all versions before 9.5.1CVE List
  • Email Protection Gatewayunaffected: 9.5.1CVE List
  • Kiteworks Email Protection Gateway, other< 9.5.1GitHub

References 2