Provide references for CVE-2021-22660.
Where can I find more information about CVE-2021-22660?
References are available at: https://www.zerodayinitiative.com/advisories/ZDI-21-446/, https://www.zerodayinitiative.com/advisories/ZDI-21-445/, https://us-cert.cisa.gov/ics/advisories/icsa-21-110-05, https://www.zerodayinitiative.com/advisories/ZDI-21-509/.