The 'authorized attacker' qualifier in this CVE masks an architectural failure worth investigating beyond the patch. The heap overflow exists in Windows Remote Access API code that was written under an implicit assumption: privileged callers don't need input validation. That assumption is the vulnerability, not the overflow itself.
When you encounter buffer overflows in trusted code paths, the reflex should be to audit the call graph, not just verify the patch. Microsoft designed this API for authorized callers, but authorization checks don't sanitize inputs — they only decide who gets to send them. That conflation is a recurring pattern across Windows privileged interfaces (named pipes, DCOM, ALPC endpoints), and it persists because bounds checking has visible cost and invisible benefit at write time, while the risk is deferred.
Your priority: determine which code path triggers this overflow and map every RPC client, named pipe, and ALPC endpoint that feeds into it. The heap overflow is one node; the blast radius is the subgraph it unlocks. Second, examine the commit history of the affected handler. Heap overflows in mature API surfaces typically aren't original code — they're mutations where a newer feature handler was grafted onto an older struct parser without inheriting the bounds checks. Look for 2015-era commits with 'caller is trusted' comments above input handling functions.
Finally, consider the temporal dimension. This haplotype — 'trusted interface, untrusted input, memory corruption' — recurs across Microsoft's privileged services. Each patch without genealogical audit leaves unfixed companions that will surface later. The remediation lag on this pattern is measured in quarters, not weeks. Your response to one CVE should trigger an audit of the entire Remote Access API surface for similar trust-model confusions.