CVE-2021-38434 json
FATEK Automation WinProladder
published 2021-10-18 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-24886
- cvss
- 7.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.0%
- EPSS 1.0% chance of exploitation in 30 days, percentile 62%
- public exploits
- 0
- none known
Summary
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.
Vendor advisories
What the vendors themselves say about their products: affected, fixed or not affected, and what to do.
cisa ICSA-21-280-06 updated cvss 7.8
FATEK Automation WinProladder
-
FATEK Automation WinProladder <= 3.30affected: mitigation “Do not click web links or open unsolicited attachments in email messages.” us-cert.cisa.gov
From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf
Exploit prediction
0.97% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.8 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.8 | AV:N/AC:M/Au:N/C:P/I:P/A:P |
Affected products
- FATEK Automation WinProladder
Classification
- Weakness
-
- CWE-194 Unexpected Sign Extension
References
-
us-cert.cisa.gov
/ics/advisories/icsa-21-280-06
third-party-advisory, us-government-resource
Sources
- CVE List CVE-2021-38434
- NVD CVE-2021-38434
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