Security readout for executives and security teams
Plain-English summary
This vulnerability affects Delta Electronics DOPSoft 2 used for HMI project work. A specially crafted project file could crash the software or run code as the logged-in user. Business risk is highest where engineers or contractors open project files from outside trusted channels.
Executive priority
Treat this as a high-priority engineering workstation risk, not a broad internet-facing emergency. Prioritize asset discovery, trusted file handling, and vendor guidance review for teams using DOPSoft 2.
Technical view
DOPSoft 2 version 2.00.07 and prior improperly validates user-supplied project file data. During font string handling, copying data into a stack buffer can overflow it, enabling code execution in the current process context. CVSS 3.1 rates it 7.8 with local attack vector and required user interaction.
Likely exposure
Likely exposure is engineering workstations using Delta Electronics DOPSoft 2 version 2.00.07 or prior, especially where project files are exchanged with vendors, contractors, or remote sites.
Exploitation context
The provided sources do not indicate active exploitation, and the CVE is not marked as CISA KEV. Exploitation requires local handling of a malicious project file and user interaction, not unauthenticated network access.
Researcher notes
Evidence supports a stack-based buffer overflow in project file parsing, specifically font string handling. The source bundle names affected DOPSoft 2 version 2.00.07 and prior, but does not provide exploit details or a specific patch version.
Mitigation direction
- Identify DOPSoft 2 installations at version 2.00.07 or prior.
- Review Delta and CISA advisory guidance for vendor-directed remediation.
- Restrict DOPSoft project files to trusted sources and verified transfer paths.
- Run engineering workstations with least privilege and strong endpoint controls.
- Isolate engineering workstations from enterprise and control networks where practical.
Validation and detection
- Inventory DOPSoft 2 versions on engineering and contractor workstations.
- Confirm whether users receive or open external DOPSoft project files.
- Check endpoint telemetry for DOPSoft crashes during project file parsing.
- Review allowlists, email controls, and file-transfer paths for project files.
- Verify remediation decisions against the referenced CISA advisory.
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
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ATT&CK lookup starting points
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Open ATT&CK lookupCVE-2021-38402 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H1.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.8HighVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-252-02CVE 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.
Stack-based Buffer Overflow
Stack-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.