Common Weakness Enumeration

    CWE Definition / CWE-166

    CWE-166: Improper Handling of Missing Special Element

    The product receives input from an upstream component, but it does not handle or incorrectly handles when an expected special element is missing.

    Published:19 Jul 2006
    Organization:MITRE
    Modified:11 Dec 2025

    Related Weakness

    CWE-159: Improper Handling of Invalid Use of Special Elements

    CWE-228: Improper Handling of Syntactically Invalid Structure

    CWE-166: Improper Handling of Missing Special Element | CVE-DB