PatchTheCVECVE-2026-102149: Kiteworks Email Protection Gateway did not sufficiently restrict which account a certificate could be assigned
CVE-2026-102149 is a critical-severity flaw (CVSS 9.4) affecting kiteworks. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- Critical severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 9.4 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.2% (top 85%) |
| CISA exploited list | No |
| Weakness | CWE-306 |
| Published | 2026-09-30 |
| Last modified | 2026-10-07 |
Last updated 2026-10-07 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-102149?
kiteworks: upgrade to 9.5.1. Exact commands for each OS are on this page.
Is CVE-2026-102149 being exploited?
CVE-2026-102149 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-102149 affect?
CVE-2026-102149 affects kiteworks. Severity is critical (CVSS 9.4). 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 integr
How urgent is CVE-2026-102149?
Priority 42/100. Critical severity; Remotely exploitable, no login, no user action
Related CVEs
- CVE-2026-102110 MEDIUM 5.9 UPGRADE An endpoint used during initial appliance setup did not require authentication and did not correctly enforce i
- CVE-2026-102117 HIGH 7.2 UPGRADE On deployments where the remote-support capability is licensed and enabled, an authenticated System Administra
- CVE-2026-102119 HIGH 7.2 UPGRADE A path traversal weakness in an optional, non-default administrative feature allowed an authenticated administ
- CVE-2026-102136 MEDIUM 6.3 UPGRADE In multi-node deployments, an attacker who had already obtained code execution on one appliance node could sub
- CVE-2026-102137 MEDIUM 4.1 UPGRADE An authenticated administrator could bypass the content validation applied to an administrative file upload an