by Kastro
Paper/Archive/CVE-2026-102149

CVE-2026-102149

Kiteworks Email Protection Gateway — Kiteworks Email Protection Gateway Improper Access Control

EPSS 0.2%CVSS 9.4
critical.is priorityof 100
31
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 15.0.150 × 203.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
Email Protection Gateway< 9.5.19.5.1CNA

Scores by source

cisa-cg (CNA)9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refgithub.com/kiteworks/security-advisories/security/advisories/GHSA-c9w5-4frw-7wqqwriteupraw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json