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Fencer Vulns
high 7.8

CVE-2021-43554 json

FATEK Automation WinProladder

published 2021-12-28 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30483

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
2.0%
EPSS 2.0% chance of exploitation in 30 days, percentile 81%
public exploits
0
none known

Summary

FATEK WinProladder Versions 3.30_24518 and prior are vulnerable to an out-of-bounds write while processing project files, which may allow an attacker 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-21-320-01 updated cvss 7.8

FATEK Automation WinProladder

  • FATEK Automation WinProladder <= 3.30_24518
    affected: 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

2.05% chance of exploitation in the next 30 days, higher than 81% 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

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.