The manufacturer publishes a vulnerability disclosure policy that at least gives contact information for reporting issues, timelines for acknowledging receipt of a report, and timelines for status updates to the reporter until the issue is resolved. ETSI TR 103 838 and ISO/IEC 29147 give guidance on coordinated vulnerability disclosure. Status in Table B.1: M (mandatory, a shall provision).
This control maps to 3 controls across 2 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 3 it maps to, and the evidence behind each claim, over MCP and REST.