CVE-2021-38403Network attack vector

Script execution via unsanitized supplier parameter

Published Nov 3, 2021 · Updated Sep 17, 2024

Cross-site scripting in Delta Electronics DIALink 1.2.4.0 and earlier allows remote authenticated users to run JavaScript via API maintenance. The API maintenance interface accepts the supplier parameter without neutralizing script content before incorporating it into a web page. Administrative authentication is required, and exploitation runs attacker-supplied script in the browser context used to view the affected data.

CVSS severity5.5
Medium
EPSS probability0.64%
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 Delta Electronics DIALink 1.2.4.0 and earlier allows remote authenticated users to run JavaScript via API maintenance. The API maintenance interface accepts the supplier parameter without neutralizing script content before incorporating it into a web page. Administrative authentication is required, and exploitation runs attacker-supplied script in the browser context used to view the affected data.

The record

CVE
CVE-2021-38403
Published
Nov 3, 2021
Updated
Sep 17, 2024
Vendor
Delta Electronics, Inc.
Product
DIALink
Classifications
CWE-79, T1059.007
Attack vector
network
Privileges
admin

Timeline

How it unfolded

  1. Nov 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record 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=All <=1.2.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesadmin

What is affected?

Delta Electronics, Inc. · DIALinkversion=All <=1.2.4.0

Published CVSS scores

5.5ICS-CERTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
4.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
3.5NIST NVDAV:N/AC:M/Au:S/C:N/I:P/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1059.007Command and Scripting Interpreter: JavaScript/JScript

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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