CWE-923: Improper Restriction of Communication Channel to Intended Endpoints
The product establishes a communication channel to (or from) an endpoint for privileged or protected operations, but it does not properly ensure that it is communicating with the correct endpoint.
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Overview
Attackers might be able to spoof the intended endpoint from a different system or process, thus gaining the same level of access as the intended endpoint. While this issue frequently involves authentication between network-based clients and servers, other types of communication channels and endpoints can have this weakness.
Real-world CVEs
62 recorded CVEs are caused by CWE-923 (Improper Restriction of Communication Channel to Intended Endpoints). The highest-severity and most recent are shown first. 20 new CWE-923 CVEs have been recorded so far in 2026 (17 in 2025).