The lack of protections on alternate paths to access control-protected assets (such as unprotected shadow registers and other external facing unguarded interfaces) allows an attacker to bypass existing protections to the asset that are only performed against the primary path.
MITRE ATT&CK techniques associated with this weakness class (mapped via MITRE CAPEC). A vulnerability of this type could let an adversary carry out:
A stage-by-stage walkthrough of the attack, mapped to the real MITRE ATT&CK tactics for this weakness — what the attacker is trying to do, what's at risk (what can be stolen or damaged), and how you defend. Understanding the playbook is how you shut it down.
Use the weakness as the way in — the first foothold on the system.
The vulnerable entry point (an input, endpoint, or dependency) that accepts attacker-controlled data.
Validate and sanitise all input at the boundary; patch to a fixed version.
Pivot from the compromised system to others on the network.
Adjacent servers, databases, and internal services reachable from the foothold.
Segmentation, per-service auth, and blocking reused credentials across systems.
Keep a remote channel to control the compromised system.
Outbound network paths the attacker uses to receive commands and stage tools.
Egress filtering, DNS/traffic monitoring, and blocking anomalous outbound connections.
This is a defensive, conceptual walkthrough for education — stages reflect MITRE ATT&CK tactics associated with this weakness class, not a working exploit. Not every attack uses every stage.