CVE-2026-23636Network attack vector

Dangerous file upload via missing type validation

Published Mar 25, 2026 · Updated Mar 25, 2026

Unrestricted file upload in Kiteworks Secure Data Forms before 9.2.1 allows remote authenticated users to upload dangerous file types. The product accepts a form manager's uploaded file without validating whether its type is dangerous. Form-manager privileges are required; the disclosed consequence is unauthorized file-type acceptance, with no broader code-execution impact published.

CVSS severity5.5
Medium
EPSS probability0.99%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unrestricted file upload in Kiteworks Secure Data Forms before 9.2.1 allows remote authenticated users to upload dangerous file types. The product accepts a form manager's uploaded file without validating whether its type is dangerous. Form-manager privileges are required; the disclosed consequence is unauthorized file-type acceptance, with no broader code-execution impact published.

The record

CVE
CVE-2026-23636
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Kiteworks
Product
Secure Data Forms
Classifications
CWE-434, T1105
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 9.2.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Kiteworks · Secure Data Formsversion=< 9.2.1

Published CVSS scores

7.2NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
5.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-434Unrestricted Upload of File with Dangerous Type
T1105Ingress Tool Transfer

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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