Security readout for executives and security teams
Plain-English summary
Delta Electronics CNCSoft has a memory corruption flaw that can let an attacker run code if a user on an affected system is involved. This is most relevant to engineering or industrial support workstations running CNCSoft, not internet-facing servers based on the provided CVSS vector.
Executive priority
Handle as a high-priority workstation and OT engineering software risk. It can lead to code execution with full impact, but available evidence does not show remote unauthenticated exploitation or active exploitation.
Technical view
CVE-2021-43982 is a stack-based buffer overflow in Delta Electronics CNCSoft. The CVSS vector is local attack, low complexity, no privileges, required user interaction, and high confidentiality, integrity, and availability impact. The source bundle names versions 1.01.30 and prior, while the affected entry says all versions.
Likely exposure
Organizations using Delta Electronics CNCSoft on Windows engineering, programming, or OT support workstations should check exposure. The provided data does not identify cloud services, network appliances, or server components as affected.
Exploitation context
The CVSS vector indicates local access and user interaction are required. The source bundle does not cite active exploitation, public exploit availability, or inclusion in CISA KEV. Treat exploitation status as unconfirmed.
Researcher notes
The key uncertainty is affected-version scope: the description says 1.01.30 and prior, while the affected field says all. Validate against the CISA advisory and vendor release notes before closing exposure.
Mitigation direction
- Inventory CNCSoft installations and record exact versions.
- Prioritize systems running CNCSoft 1.01.30 or prior.
- Check Delta Electronics and CISA advisory guidance for fixed versions or mitigations.
- Limit CNCSoft use on untrusted files or workflows until remediated.
- Restrict access to engineering workstations running CNCSoft.
Validation and detection
- Confirm whether CNCSoft is installed on engineering and OT support workstations.
- Verify installed CNCSoft version against 1.01.30 and prior.
- Review CISA ICSA-21-334-03 for vendor-specific remediation details.
- Check endpoint telemetry for unexpected CNCSoft crashes or 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
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CWE-121: Exact CWE lookup
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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-2021-43982 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-21-334-03CVE 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.