Security readout for executives and security teams
Plain-English summary
FvDesigner project files can trigger memory corruption in vulnerable versions. If an engineering workstation opens a crafted project, an attacker may run code on that system. This is most relevant to organizations using FATEK automation tooling in operational technology environments.
Executive priority
Treat this as high priority if FvDesigner is present in OT engineering workflows. The practical risk depends on whether users open untrusted project files and whether affected workstations can reach sensitive automation environments.
Technical view
CVE-2021-32939 is a CWE-787 out-of-bounds write in FATEK Automation FvDesigner 1.5.88 and prior while processing project files. The published description says a crafted project file may permit arbitrary code execution. CVSS, patch status, and detailed exploit prerequisites are not provided in the bundle.
Likely exposure
Exposure is limited to systems with FATEK Automation FvDesigner versions 1.5.88 or earlier, especially engineering workstations that receive or open project files from external parties, vendors, removable media, or shared repositories.
Exploitation context
The source bundle supports a crafted-project-file attack path. It does not show CISA KEV listing, confirmed active exploitation, public exploit use, or exploitation without user interaction.
Researcher notes
The bundle establishes product, affected versions, weakness class, and arbitrary-code-execution impact, but omits CVSS details, patch version, and exploit maturity. Avoid claiming active exploitation without additional cited evidence.
Mitigation direction
- Inventory FvDesigner installations and identify versions 1.5.88 or earlier.
- Check FATEK, CISA, and ZDI guidance for vendor remediation or update instructions.
- Restrict opening project files from untrusted or unexpected sources.
- Use endpoint controls on engineering workstations handling FvDesigner projects.
- Segment and tightly manage OT engineering workstations where feasible.
Validation and detection
- Confirm whether FvDesigner is installed on engineering or shared workstations.
- Record installed FvDesigner versions and compare against 1.5.88 and prior.
- Review workflows where project files arrive from vendors or external users.
- Check security telemetry for suspicious activity involving FvDesigner processes.
- Verify remediation status against current vendor or CISA guidance.
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-787: 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-2021-32939 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-217-02CVE reference · x_refsource_MISC
- https://www.zerodayinitiative.com/advisories/ZDI-21-1028/CVE 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.
Out-of-bounds Write
Out-of-bounds Write represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.