CVE-2021-38418

Information interception via unencrypted HTTP transport

Published Nov 3, 2021 · Updated Sep 16, 2024

Cleartext transmission in Delta Electronics DIALink 1.2.4.0 and earlier allows attackers to intercept sensitive information over HTTP. The web interface uses HTTP by default and therefore transmits requests and responses without transport encryption. A position between the client and server is required, and the published technical description limits the stated consequence to unauthorized information access.

CVSS severity8.8
High
EPSS probability0.57%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Delta Electronics DIALink 1.2.4.0 and earlier allows attackers to intercept sensitive information over HTTP. The web interface uses HTTP by default and therefore transmits requests and responses without transport encryption. A position between the client and server is required, and the published technical description limits the stated consequence to unauthorized information access.

The record

CVE
CVE-2021-38418
Published
Nov 3, 2021
Updated
Sep 16, 2024
Vendor
Delta Electronics, Inc.
Product
DIALink
Classifications
CWE-319, T1557
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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 vectoradjacent
Required privilegesunauthenticated

What is affected?

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

Published CVSS scores

8.8ICS-CERTCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.9NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

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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