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VulnerabilityPublished

CVE-2026-102144: Kiteworks Email Protection Gateway · Missing Authentication

Affects Kiteworks Email Protection GatewaySource CVE Database V5

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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

CVSS 3.1 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
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:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 30 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
KiteworksEmail Protection GatewayAffected
  • <9.5.1
Fixed in
  • 9.5.1

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).

References

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