CWE-704

Class Abstraction Level
Pillar — Highest-level weakness category
Class — Abstract, language-independent
Base — Specific enough to detect
Variant — Tied to specific technology
Compound — Requires multiple weaknesses Incomplete MITRE CWE Status
Stable — Fully reviewed and complete
Draft — Under development, may change
Incomplete — Partially defined by MITRE
Deprecated — No longer recommended
Obsolete — Replaced by another CWE
Incorrect Type Conversion or Cast

Description

The product does not correctly convert an object, resource, or structure from one type to a different type.

Top Monitored CVEs

CVE-2025-41646
CRITICAL
9.8 40.7%
2025-06-06
CVE-2021-39173
HIGH
8.8 2.4%
2021-08-27

Consequences

Other — Other

Detection

Fuzzing

Fuzz testing (fuzzing) is a powerful technique for generating large numbers of diverse inputs - either randomly or algorithmically - and dynamically invoking the code with those inputs. Even with random inputs, it is often capable of generating unexpected results such as crashes, memory corruption, or resource consumption. Fuzzing effectively produces repeatable test cases that clearly indicate bugs, which helps developers to diagnose the issues.