Security readout for executives and security teams
Plain-English summary
Delta Electronics DIALink 1.2.4.0 and earlier has an authenticated cross-site scripting flaw. Someone with high-privilege access could inject JavaScript into an API device parameter name, potentially affecting users or workflows that process that data.
Executive priority
Treat as a moderate-priority industrial software issue. It is not reported as actively exploited here, but affected DIALink systems should be inventoried and remediated through vendor guidance.
Technical view
CVE-2021-38407 is CWE-79 in Delta Electronics DIALink 1.2.4.0 and prior. The CVSS 3.1 vector is network-accessible, low complexity, high privileges required, no user interaction, changed scope, and low confidentiality and integrity impact.
Likely exposure
Exposure is limited to environments running Delta Electronics DIALink 1.2.4.0 or earlier, especially where authenticated management or API access is reachable beyond tightly controlled administrators.
Exploitation context
The bundle does not show CISA KEV listing or cited active exploitation. The attack requires authenticated high privileges, which lowers likelihood, but the network vector and changed scope keep it operationally relevant.
Researcher notes
Evidence is limited to CVE metadata and the CISA ICS advisory reference. The description says injected JavaScript may allow remote code execution, but the scoring reflects XSS with low confidentiality and integrity impact.
Mitigation direction
- Identify all Delta Electronics DIALink deployments and versions.
- Check Delta and CISA advisory guidance for the supported update or mitigation.
- Restrict DIALink management and API access to trusted administrators.
- Review privileged DIALink accounts for unnecessary or stale access.
- Monitor for unexpected script-like values in API device parameter names.
Validation and detection
- Confirm whether any DIALink instance is version 1.2.4.0 or earlier.
- Verify authenticated users with API device configuration privileges.
- Review device parameter names for suspicious JavaScript-like content.
- Confirm management/API interfaces are not exposed to untrusted networks.
- Document vendor guidance applied or compensating controls used.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
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
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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.
Open ATT&CK lookupCVE-2021-38407 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- 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
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.
CVSS vector scores
1 official scoreWe 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.
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N2.32.7Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
5.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-294-02CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.