CVE-2026-102128

highpriority · track · 0EPSS 0.002 · 11 %ileDENLUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.21% (11th) EPSS

CVSS 7.5 · high

Is it mine?

11 products

Check your exposure

Who says so?

4 sources

cert_bund · cisa_csaf_it · ncsc_nl · nvd

EPSS · scored 2026-10-27

An identity-verification weakness in Kiteworks Email Protection Gateway allowed the gateway to act on the Kiteworks platform on behalf of a user it had not authenticated, and to provision a platform account for an identity it did not already know. A remote, unauthenticated sender could potentially exploit this to obtain control of a platform account.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedEmail Protection Gatewaycisa_csaf_it
Fixed in 9.5.1.
https://www.kiteworks.com/company/press-releases/kiteworks-precautionary-shutdown-advisory/

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · CISA US

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondaryexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · NCSC-NL NL

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-287USCWE-287US

affected products (11)

Products and version ranges known to be affected.

Kiteworks Kiteworks <9.5.1all versionscert_bundDE
Kiteworks Kiteworks< 9.5.1cert_bundDE
Kiteworks Email Protection Gateway 9.5.1all versionsfixedcisa_csaf_itUS
Kiteworks Email Protection Gateway <9.5.1all versionscisa_csaf_itUS
Kiteworks Email Protection Gatewayall versionsfixedcisa_csaf_itUS
Kiteworks Email Protection Gateway< 9.5.1cisa_csaf_itUS
Kiteworks Email Protection Gateway≤ vers:unknown/*ncsc_nlNL
Kiteworks Kiteworks≤ vers:unknown/*ncsc_nlNL
Kiteworks Secure Data Forms≤ vers:unknown/*ncsc_nlNL
Kiteworks core≤ vers:unknown/*ncsc_nlNL
accellion kiteworks< 9.5.1nvdUScpe:2.3:a:accellion:kiteworks:*:*:*:*:*:*:*:*

advisories (3)

Vendor and ecosystem advisories describing this.

NCSC-2026-0408Kwetsbaarheden verholpen in KiteworksNL2026-10-08csaf · ncsc_nlNL
Kiteworks heeft meerdere kwetsbaarheden verholpen in de Kiteworks productlijn.
VA-26-274-01Kiteworks multiple vulnerabilities2026-09-30csaf · cisa_csaf_itUS
Fixed in version 9.5.0 and 9.5.1.
WID-SEC-W-2026-3695Kiteworks: Mehrere SchwachstellenDeutsch2026-09-30csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Kiteworks ausnutzen, Authentifizierungs- oder Zugriffskontrollen zu umgehen, Benutzer- oder Administratorkonten zu übernehmen, Berechtigungen zu erhöhen, sensible Informationen auszulesen oder zu verändern, beliebige Dateien zu schreiben, interne Systeme per SSRF anzusprechen, SQL- oder Betriebssystembefehle einzuschleusen, Remote Code Execution zu erreichen oder Dienste durch Denial-of-Service zu beeinträchtigen.

sources

Which sources assert this record, and when.

cert_bund cisa_csaf_it ncsc_nl nvd NVD CVE.org MITRE

published 2026-09-30modified 2026-10-08

references (2) nvd

External citations — patches, advisories, analysis.

scry

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