Malicious code has been identified in specific versions of the bitcoincore package distributed via NuGet. The affected versions include 0.0.4, 0.0.9, 0.0.13, 0.0.18, 0.0.22, 1.0.24, and 1.0.25. This is a supply chain threat involving a malicious package rather than a traditional software vulnerability. There is no CVSS score or detailed technical exploitation information available. No known exploits in the wild have been reported as of the publication date.