CVE-2026-102144: Kiteworks Email Protection Gateway · Missing Authentication
Affects Kiteworks Email Protection GatewaySource CVE Database V5
Not known to be exploited · CVSS 5.3 Medium : upgrade to 9.5.1 when convenient.
Data as of 14 Nov 2026, 20:43 UTC
- EPSS
- 0.3% chance of exploitation in 30 days – higher than 30% 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:N/A:LExploitation 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, consider restricting access to the affected service or implementing rate limiting to mitigate resource exhaustion attempts.
Description
CVE-2026-102144 is a resource exhaustion vulnerability in Kiteworks Email Protection Gateway that allows an unauthenticated remote attacker to repeatedly trigger an expensive server-side operation, causing a partial denial of service. The vulnerability is due to missing authentication for a critical function. It affects versions from 0 up to but not including 9.5.1. The CVSS score is 5.3 (medium severity).