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VulnerabilityPublished

CVE-2026-102128: Kiteworks Email Protection Gateway · Improper Authentication

Affects Kiteworks Email Protection GatewaySource CVE Database V5

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Not known to be exploited · CVSS 7.5 High : upgrade to 9.5.1 soon.

Data as of 14 Nov 2026, 20:43 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 11% 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:N

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, restrict access to the Email Protection Gateway and monitor for suspicious activity related to account provisioning.

Description

CVE-2026-102128 is an improper authentication vulnerability in Kiteworks Email Protection Gateway. It allows the gateway to act on the Kiteworks platform on behalf of an unauthenticated user and provision platform accounts for unknown identities. A remote attacker without authentication could exploit this flaw to gain control over a platform account. The vulnerability affects versions prior to 9.5.1. The CVSS score is 7.5, indicating high severity due to the potential for unauthorized account control without user interaction.

References

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