In WebAccess/SCADA, Versions 8.3.5 and prior, multiple stack-based buffer overflow vulnerabilities are caused by a lack of proper validation of the length of user-supplied data. Exploitation of these vulnerabilities may allow remote code execution.
www.us-cert.gov/ics/advisories/icsa-19-178-05
www.zerodayinitiative.com/advisories/ZDI-19-586/
www.zerodayinitiative.com/advisories/ZDI-19-588/
www.zerodayinitiative.com/advisories/ZDI-19-589/
www.zerodayinitiative.com/advisories/ZDI-19-592/
www.zerodayinitiative.com/advisories/ZDI-19-594/
www.zerodayinitiative.com/advisories/ZDI-19-619/
www.zerodayinitiative.com/advisories/ZDI-19-620/