CVE-2026-102143: Kiteworks Email Protection Gateway · Missing Authentication
Affects Kiteworks Email Protection GatewaySource CVE Database V5
Not known to be exploited · CVSS 7.5 High : upgrade to 9.5.1 soon.
Data as of 14 Nov 2026, 20:43 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 25% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
- Patch
- Available – fixed in 9.5.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 30 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 14 Nov 2026.
What to do
Upgrade Kiteworks Email Protection Gateway to 9.5.1.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| KiteworksEmail Protection Gateway | Affected
| Fixed in
|
AI-suggested
If you cannot patch yet, restrict access to the administrative upload handler and monitor for suspicious activity related to file uploads.
Description
CVE-2026-102143 is a vulnerability in Kiteworks Email Protection Gateway where an unauthenticated attacker can write a file with attacker-controlled content to the appliance filesystem via an administrative upload handler lacking proper authentication. This flaw does not directly allow code execution, as that would require an additional vulnerability to place the file in an executable location. The issue affects versions prior to 9.5.1.