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CVE Record

CVE-2021-38411: Delta Electronics DIALink

Delta Electronics DIALink versions 1.2.4.0 and prior is vulnerable to cross-site scripting because an authenticated attacker can inject arbitrary JavaScript code into the parameter deviceName of the API modbusWriter-Reader, which may allow an attacker to remotely execute code.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

Delta DIALink 1.2.4.0 and prior has an authenticated cross-site scripting flaw. A high-privilege user could place JavaScript in a device name field, potentially affecting users or workflows that process that value. Business urgency is moderate: exposure depends on whether DIALink is deployed and reachable by authenticated operators.

Executive priority

Treat as a moderate operational technology application risk. Prioritize if DIALink is used in production environments, reachable remotely, or administered by many privileged users.

Technical view

CVE-2021-38411 is CWE-79 in the deviceName parameter of the modbusWriter-Reader API. CVSS 3.1 is 5.5 with network access, low complexity, high privileges required, no user interaction, changed scope, and low confidentiality and integrity impact.

Likely exposure

Most likely exposure is industrial or operational environments running Delta Electronics DIALink 1.2.4.0 or prior. The source bundle does not confirm internet exposure, deployment prevalence, or specific patched versions.

Exploitation context

CISA KEV status is false in the bundle, and no cited source states active exploitation. Exploitation requires authenticated high privileges, reducing opportunistic risk but still relevant where accounts are shared, overprivileged, or exposed remotely.

Researcher notes

Evidence is limited to the CVE description, CVSS vector, CWE, KEV false status, and CISA advisory reference. Do not assume unauthenticated access, public exploitation, or a specific patch unless confirmed in vendor guidance.

Mitigation direction

  • Identify any Delta DIALink deployments and record exact versions.
  • Check Delta and CISA guidance for supported fixed versions or workarounds.
  • Limit DIALink access to trusted management networks and authorized operators.
  • Review privileged DIALink accounts and remove unnecessary access.
  • Monitor changes to device names and related API activity.

Validation and detection

  • Inventory systems for Delta Electronics DIALink installations.
  • Confirm whether any instance is version 1.2.4.0 or prior.
  • Review access paths to DIALink management and API surfaces.
  • Check logs or records for unexpected deviceName changes.
  • Verify remediation status against vendor or CISA guidance.
Prepared
Confidence
medium
Sources
3

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · medium confidence lookup

CWE-79: User-session and phishing behavior lookup

Client-side and session-facing weaknesses should be reviewed alongside initial-access and user-execution behaviors. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2021-38411 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N2.32.7Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2021-38411Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
Delta ElectronicsDIALinkAllListed
Weakness

CWE details

CWE-79

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.