Provide references for CVE-2021-25176.
Where can I find more information about CVE-2021-25176?
References are available at: https://www.opendesign.com/security-advisories, https://cert-portal.siemens.com/productcert/pdf/ssa-663999.pdf, https://www.zerodayinitiative.com/advisories/ZDI-21-221/, https://www.zerodayinitiative.com/advisories/ZDI-21-222/, https://cert-portal.siemens.com/productcert/pdf/ssa-155599.pdf.