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VulnerabilityPublished

CVE-2026-102106: Kiteworks Email Protection Gateway · Improper Authentication

Affects Kiteworks Email Protection GatewaySource CVE Database V5

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Not known to be exploited · CVSS 9.1 Critical : upgrade to 9.5.0 as a priority.

Data as of 14 Nov 2026, 20:43 UTC

CVSS 3.1 base score
9.1Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.0% chance of exploitation in 30 days – higher than 65% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 9.5.0
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H

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 9.5.0.

Affected software

ProductAffectedFixed in
KiteworksEmail Protection GatewayAffected
  • <9.5.0
Fixed in
  • 9.5.0

AI-suggested

If you cannot patch yet, restrict access to the administrative service and monitor for unauthorized access attempts referencing administrator accounts.

Description

CVE-2026-102106 is an improper authentication vulnerability in the Kiteworks Email Protection Gateway administrative service. The service fails to consistently enforce administrator authentication, allowing attackers referencing a valid administrator account to bypass password checks. This flaw enables unauthorized creation, modification, or deletion of internal users and managed domains, as well as changes to security configurations. Deleting a managed domain can remove its user accounts and potentially lock out legitimate administrators.

References

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