What is CVE-2021-38434?

CVE-2021-38434 is a high-severity vulnerability in Fatek Winproladder, classified under CWE-194. CVSS score: 7.8/10. Published 2021-10-18.

How severe is CVE-2021-38434?

High severity. CVSS v3 base score is 7.8 out of 10.

Vulnerability in Fatek Winproladder

CVE-2021-38434

FATEK Automation WinProladder versions 3.30 and prior lacks proper validation of user-supplied data when parsing project files, which could result in an unexpected sign extension. An attacker could leverage this vulnerability to execute arbitrary code.

Published 2021-10-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.010 (60.4th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Fatek Winproladder
Fatek Automation Winproladder — versions All

Weakness classification (CWE)

CWE-194

References

us-cert.cisa.gov/ics/advisories/icsa-21-280-06 (US Government Resource, Third Party Advisory)

Frequently asked questions

What is CVE-2021-38434?: CVE-2021-38434 is a high-severity vulnerability in Fatek Winproladder, classified under CWE-194. CVSS score: 7.8/10. Published 2021-10-18.
How severe is CVE-2021-38434?: High severity. CVSS v3 base score is 7.8 out of 10.