CVE-2026-102149

EUVD-2026-90385
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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
9.4 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Base Score
CVSS 3.x
EPSS Score
Percentile: 15.07%
Affected Products (NVD)
VendorProductVersion
accellionkiteworks
𝑥
< 9.5.1
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/kiteworks/security-advisories/security/advisories/GHSA-c9w5-4frw-7wqq
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json