TI-2021-08971 Aliases CVE-2021-27486 GHSA-w8rx-73fm-r2mv

Integer underflow in FATEK Automation WinProladder

LOW 36CWE-191Published 2021-04-12 · Updated 2024-08-03

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-191 and the CVSS impact.

Summary

FATEK Automation WinProladder Versions 3.30 and prior is vulnerable to an integer underflow, which may cause an out-of-bounds write and allow an attacker to execute arbitrary code.

Why it matters now

EPSS 0.01017 63rd percentileScored 2026-11-07

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	FATEK Automation WinProladder	WinProladder Versions 3.30 and prior	—	No fix listed	CNA

FATEK Automation WinProladder Vendor— Affected WinProladder Versions 3.30 and prior Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:fatek:winproladder::::::::	up to 3.30	Vulnerable	FATEK Automation

cpe:2.3:a:fatek:winproladder:*:*:*:*:*:*:*:* Versions up to 3.30 Vulnerable ·FATEK Automation

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2021-27486
2026-10-03 Alias added: GHSA-w8rx-73fm-r2mv

References

Advisory 1

https://us-cert.cisa.gov/ics/advisories/icsa-21-098-01

TI-2021-12600 Memory corruption in FATEK Automation WinProladder CVSS 3.1CRITICAL 9.8
TI-2021-12598 Out-of-bounds read in FATEK Automation WinProladder CVSS 3.1CRITICAL 9.8
TI-2021-12596 Out-of-bounds write in FATEK Automation WinProladder CVSS 3.1CRITICAL 9.8
TI-2021-19446 Stack-based buffer overflow in FATEK Automation WinProladder CVSS 3.1HIGH 7.8
TI-2021-19444 Out-of-bounds write in FATEK Automation WinProladder CVSS 3.1HIGH 7.8
TI-2020-12763 Stack-based buffer overflow in FATEK Automation PLC WinProladder CVSS 3.1HIGH 7.8

See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences