CVE-2021-43556

HighCVSS 7.8/10Last modified Jun 17, 2026

Description

FATEK WinProladder Versions 3.30_24518 and prior are vulnerable to a stack-based buffer overflow while processing project files, which may allow an attacker to execute arbitrary code.

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-121 CWE-787

Affected software

Vendor	Product	Versions
FATEK Automation	WinProladder	>= All, <= 3.30_24518

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-320-01Mitigation, Third Party Advisory, US Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-22-029/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-031/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-032/Third Party Advisory, VDB Entry
https://us-cert.cisa.gov/ics/advisories/icsa-21-320-01Mitigation, Third Party Advisory, US Government Resource
https://www.zerodayinitiative.com/advisories/ZDI-22-029/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-031/Third Party Advisory, VDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-22-032/Third Party Advisory, VDB Entry

Timeline

Published: Dec 28, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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