Vulnerability in Kiteworks Email Protection Gateway

[ Description ]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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• NCSC-NL8 Oct 2026NCSC-2026-0408

  Vulnerabilities fixed in Kiteworks Translated from Dutch

  Probability/damage M/HCVE-2026-102089CVE-2026-102090CVE-2026-102091+58 more CVEs
• BSI CERT-Bund30 Sep 2026WID-SEC-2026-3695

  Kiteworks: Multiple vulnerabilities Translated from German

  CVE-2026-102100CVE-2026-102144CVE-2026-102117+58 more CVEs

[ References ]References

• github.com/kiteworks/security-advisories/security/advisories/GHSA-62f6-c955-4fhqVendor Advisory
• raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.jsonBroken Link