CVE-2021-38420

Local file modification via writable installation directory

Published Nov 3, 2021 · Updated Sep 16, 2024

Incorrect default permissions in Delta Electronics DIALink 1.2.4.0 and earlier allow local users to modify its installation directory. The installation directory grants extensive access to low-privileged accounts, permitting malicious files to be placed among application files. Exploitation requires a low-privileged local account and can alter DIALink files or introduce attacker-controlled files.

CVSS severity7.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Delta Electronics DIALink 1.2.4.0 and earlier allow local users to modify its installation directory. The installation directory grants extensive access to low-privileged accounts, permitting malicious files to be placed among application files. Exploitation requires a low-privileged local account and can alter DIALink files or introduce attacker-controlled files.

The record

CVE
CVE-2021-38420
Published
Nov 3, 2021
Updated
Sep 16, 2024
Vendor
Delta Electronics, Inc.
Product
DIALink
Classifications
CWE-276
Attack vector
local
Privileges
authenticated

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 vectorlocal
Required privilegesauthenticated

What is affected?

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

Published CVSS scores

4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P
7.8ICS-CERTCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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.

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No observations available

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

Weakness, pattern, technique

CWE-276Incorrect Default Permissions

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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