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OpenAdvisories
Critical · 9.1 CVE-2026-102106 EUVD-2026-90313

Kiteworks Email Protection Gateway improper authentication

Published Sep 30, 2026 · Updated Oct 1, 2026 · Assigned by cisa-cg

Description

Improper authentication in a Kiteworks Email Protection Gateway administrative service. An administrative service in Kiteworks Email Protection Gateway did not consistently enforce administrator authentication, so the required password check could be bypassed. An attacker who referenced a valid administrator account could potentially create, modify, or delete internal users and managed domains and change their security-feature configuration without authenticating; deleting a managed domain also removes its user accounts and could lock administrators out of the gateway.

Affected products

VendorProductAffectedFixed
Kiteworks Email Protection Gateway < 9.5.0 9.5.0

Advisories 3

References

  • url vendor-advisory
  • url third-party-advisory