Security readout for executives and security teams
Plain-English summary
This is a low-severity information disclosure issue in FATEK Automation WinProladder 3.30 and prior. An attacker who can get a user to interact locally with vulnerable software may read limited unauthorized information. The business risk is mainly to engineering workstations, not broad network compromise.
Executive priority
Treat this as routine OT workstation hygiene unless WinProladder is widely used or receives files from untrusted parties. Prioritize inventory and vendor guidance checks over emergency response.
Technical view
CVE-2021-38440 is a CWE-125 out-of-bounds read in FATEK Automation WinProladder. The CVSS 3.1 vector is AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N, indicating local attack conditions, required user interaction, and confidentiality-only impact.
Likely exposure
Exposure is most likely where FATEK WinProladder 3.30 or prior is installed on engineering, maintenance, or ICS support workstations. The provided sources do not identify server-side exposure or remote network exploitation.
Exploitation context
CISA KEV status is false, and the provided sources do not state active exploitation. The CVSS vector indicates exploitation needs local conditions and user interaction, with low confidentiality impact only.
Researcher notes
The bundle identifies WinProladder 3.30 and prior, while the affected entry says all versions. Treat version scope as needing confirmation against CISA or vendor advisory text. No exploit status, patch version, or workaround details are provided in the bundle.
Mitigation direction
- Inventory WinProladder installations and identify versions 3.30 and prior.
- Check CISA and FATEK guidance for vendor-approved updates or mitigations.
- Restrict WinProladder use to trusted engineering workstations.
- Limit opening project or automation files from untrusted sources.
- Apply least-privilege workstation controls for engineering users.
Validation and detection
- Confirm whether WinProladder is installed on OT and engineering endpoints.
- Record installed WinProladder versions and compare against 3.30 and prior.
- Review vendor or CISA advisory guidance before declaring remediation complete.
- Verify workstation controls limit untrusted local file interaction.
- Document accepted residual risk if no vendor fix is available.
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-125: 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 lookupCVE-2021-38440 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
- Low
- CVSS
- 3.3 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/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:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N1.81.4Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
3.3LowVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://us-cert.cisa.gov/ics/advisories/icsa-21-280-06CVE 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 Read
Out-of-bounds Read represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.