CVE-2026-102149 Kiteworks Email Protection Gateway Improper Access Control

What is CVE-2026-102149?

CVE-2026-102149 is a critical missing authorization vulnerability in Accellion Kiteworks, published on 30 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official 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.

Weakness: CWE-306

Which versions are affected by CVE-2026-102149?

It affects 1 product.

Products include Accellion Kiteworks.

How do I fix CVE-2026-102149?

No fix has been published for CVE-2026-102149 yet. Limit exposure of the affected software until one is available.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2026-102149 being exploited?

There is no known exploitation of CVE-2026-102149 in the wild and no public exploit code.

Other vulnerabilities in Accellion Kiteworks

• CVE-2026-102115 Kiteworks Core Authentication Bypass in the Password Reset Workflow Critical 9.8
• CVE-2026-102147 Kiteworks Core Administrative Account Takeover through Stored Cross-site Scripting (XSS) Critical 9.3
• CVE-2026-102095 Kiteworks Email Protection Gateway server-side request forgery Critical 9.1
• CVE-2026-102102 Kiteworks Email Protection Gateway server-side request forgery Critical 9.1
• CVE-2026-102103 Kiteworks Email Protection Gateway server-side request forgery Critical 9.1

All Accellion Kiteworks vulnerabilities

Sources

• CVE record
• NVD
• OSV
• How this page is made