Security readout for executives and security teams
Plain-English summary
Delta Electronics DIAScreen before version 1.1.0 has a memory-handling flaw that can let an attacker run code if a user interacts with malicious content. The business risk is highest on OT engineering or operator workstations where DIAScreen is installed.
Executive priority
Treat this as a high-priority OT workstation remediation item, not an emergency internet-wide issue. Prioritize sites where DIAScreen supports production operations or where operators process external project files.
Technical view
CVE-2021-32965 is a CWE-843 type confusion vulnerability with possible out-of-bounds write impact in Delta Electronics DIAScreen prior to 1.1.0. The CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, indicating local execution conditions and required user interaction.
Likely exposure
Exposure is likely limited to systems running Delta Electronics DIAScreen versions earlier than 1.1.0, especially Windows workstations in industrial control environments. The source bundle does not identify cloud, server, or internet-facing exposure.
Exploitation context
The provided sources do not report active exploitation, and the CVE is not marked as CISA KEV. The CVSS vector indicates exploitation requires local access conditions and user interaction, which reduces broad remote attack likelihood but still matters in OT environments.
Researcher notes
Available public detail is limited to the CVE description, CVSS vector, CWE classification, affected version threshold, and CISA advisory reference. Do not assume exploit availability, network reachability, or additional affected Delta products from this bundle.
Mitigation direction
- Upgrade DIAScreen installations to version 1.1.0 or later where available.
- Follow Delta Electronics and CISA ICS advisory guidance for deployment sequencing.
- Restrict DIAScreen workstations to trusted users and managed software sources.
- Avoid opening untrusted DIAScreen files, projects, or attachments.
- Monitor protected OT workstations for unexpected DIAScreen crashes or process behavior.
Validation and detection
- Inventory all DIAScreen installations and record exact versions.
- Flag any DIAScreen version earlier than 1.1.0 for remediation.
- Confirm patched systems are running DIAScreen 1.1.0 or later.
- Review whether DIAScreen users receive files from untrusted external sources.
- Check endpoint logs for unusual DIAScreen failures or suspicious child processes.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-843: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. 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 lookupExecution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-32965 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
- 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://www.cisa.gov/uscert/ics/advisories/icsa-21-208-05CVE 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.
Access of Resource Using Incompatible Type ('Type Confusion')
Access of Resource Using Incompatible Type ('Type Confusion') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.