CWE-1327: Binding to an Unrestricted IP Address
The product assigns the address 0.0.0.0 for a database server, a cloud service/instance, or any computing resource that communicates remotely.
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Overview
When a server binds to the address 0.0.0.0, it allows connections from every IP address on the local machine, effectively exposing the server to every possible network. This might be much broader access than intended by the developer or administrator, who might only be expecting the server to be reachable from a single interface/network.
Real-world CVEs
27 recorded CVEs are caused by CWE-1327 (Binding to an Unrestricted IP Address). The highest-severity and most recent are shown first. 14 new CWE-1327 CVEs have been recorded so far in 2026 (3 in 2025).
- CVE-2026-82456
argocd-mcp 0.8.0 Authentication Bypass via Unauthenticated HTTP
Critical · CVSS 10.0 · EPSS 77th2026-08-29 - CVE-2023-1968Critical · CVSS 10.0 · EPSS 78th2023-04-28
- CVE-2026-20212
Cisco Nexus 3000 and 9000 Series Switches Silicon One Hardware Abstraction Layer Remote Code Execution Vulnerability
Critical · CVSS 9.8 · EPSS 53th