CVE-2026-4293Network attack vector

Browser control via undisclosed web-portal XSS

Published May 20, 2026 · Updated May 20, 2026

Cross-site scripting in Kieback & Peter DDC controllers at affected versions allows remote attackers to execute JavaScript in a victim's browser. CISA and Kieback & Peter have not published the affected web-portal parameter or the operation that fails to neutralize attacker-controlled input before placing it in a page. Network access to the device web portal is required; successful exploitation controls browser-displayed content without reported confidentiality or availability impact.

CVSS severity5.3
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cross-site scripting in Kieback & Peter DDC controllers at affected versions allows remote attackers to execute JavaScript in a victim's browser. CISA and Kieback & Peter have not published the affected web-portal parameter or the operation that fails to neutralize attacker-controlled input before placing it in a page. Network access to the device web portal is required; successful exploitation controls browser-displayed content without reported confidentiality or availability impact.

The record

CVE
CVE-2026-4293
Published
May 20, 2026
Updated
May 20, 2026
Vendor
Kieback&Peter
Product
DDC4400e
Classifications
CWE-79
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 20, 2026CVE publishedPublication date reported by the CVE source.
  2. May 20, 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=0 <=1.23.4

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Kieback&Peter · DDC4400eversion=0 <=1.23.4
Kieback&Peter · DDC4100version=0 <=1.12.14
Kieback&Peter · DDC4200eversion=0 <=1.23.4
Kieback&Peter · DDC4200version=0 <=1.12.14
Kieback&Peter · DDC4002version=0 <=1.12.14
Kieback&Peter · DDC520version=0 <=1.24.1
Kieback&Peter · DDC4200-Lversion=0 <=1.12.14
Kieback&Peter · DDC4400version=0 <=1.12.14
Kieback&Peter · DDC4002eversion=0 <=1.23.4
Kieback&Peter · DDC4020eversion=0 <=1.23.4
Kieback&Peter · DDC4040eversion=0 <=1.23.4

Published CVSS scores

5.3ICS-CERTCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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