CVE-2026-102128: CWE-287 Improper Authentication in Kiteworks Email Protection Gateway
CVE-2026-102128 is an improper authentication vulnerability in Kiteworks Email Protection Gateway. It allows a remote, unauthenticated attacker to cause the gateway to act on behalf of a user it has not authenticated and to provision a platform account for an unknown identity. This flaw could enable an attacker to gain control over a platform account without proper authentication. The vulnerability affects versions prior to 9.5.1. The CVSS score is 7.5, indicating high severity.
AI Analysis
Technical Summary
This vulnerability (CWE-287) in Kiteworks Email Protection Gateway involves an identity-verification weakness where the gateway improperly authenticates users. As a result, a remote attacker without authentication can exploit the gateway to act on behalf of a user and provision platform accounts for identities not previously known to the system. This could lead to unauthorized account control. The issue affects versions before 9.5.1 and has a CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
Potential Impact
An unauthenticated remote attacker could exploit this vulnerability to gain control of a platform account by leveraging the gateway's improper authentication mechanism. This could lead to unauthorized actions on the Kiteworks platform, potentially compromising account integrity. There is no reported confidentiality or availability impact, but integrity impact is high.
Mitigation Recommendations
No patch links or vendor advisory content are provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the Email Protection Gateway and monitor for suspicious activity related to account provisioning.
CVE-2026-102128: CWE-287 Improper Authentication in Kiteworks Email Protection Gateway
Description
CVE-2026-102128 is an improper authentication vulnerability in Kiteworks Email Protection Gateway. It allows a remote, unauthenticated attacker to cause the gateway to act on behalf of a user it has not authenticated and to provision a platform account for an unknown identity. This flaw could enable an attacker to gain control over a platform account without proper authentication. The vulnerability affects versions prior to 9.5.1. The CVSS score is 7.5, indicating high severity.
CVSS v3.1
Score 7.5high
Affected software
Kiteworks
Email Protection Gateway
pkg:github/kiteworks/email-protection-gatewayRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CWE-287) in Kiteworks Email Protection Gateway involves an identity-verification weakness where the gateway improperly authenticates users. As a result, a remote attacker without authentication can exploit the gateway to act on behalf of a user and provision platform accounts for identities not previously known to the system. This could lead to unauthorized account control. The issue affects versions before 9.5.1 and has a CVSS 3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N).
Potential Impact
An unauthenticated remote attacker could exploit this vulnerability to gain control of a platform account by leveraging the gateway's improper authentication mechanism. This could lead to unauthorized actions on the Kiteworks platform, potentially compromising account integrity. There is no reported confidentiality or availability impact, but integrity impact is high.
Mitigation Recommendations
No patch links or vendor advisory content are provided. Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict access to the Email Protection Gateway and monitor for suspicious activity related to account provisioning.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisa-cg
- Date Reserved
- 2026-09-28T17:39:13.563Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abd724f2a4e24523d8ebe17
Added to database: 09/30/2026, 20:34:23 UTC
Last enriched: 09/30/2026, 21:03:50 UTC
Last updated: 09/30/2026, 21:48:59 UTC
Views: 3
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