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

Kiteworks Email Protection Gateway contains a broken access control vulnerability caused by insufficient restriction on certificate assignment, letting attackers associate certificates with other users' accounts, affecting encrypted mail confidentiality and integrity, and potentially allowing unauthorized access, exploit requires certificate-based login enabled.

CVSS base score 9.4 /10
Critical
CISA KEV
Not listed
Public exploit
None known
EPSS
0.24% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Information Disclosure, Data Tampering, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L
Published
30 September 2026
Updated
15 October 2026
Weakness
CWE-306

Vendor fix

Update to the latest version with proper certificate assignment restrictions.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

← All CVEs