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Home/CWEs/CWE-400
Common Weakness Enumeration

CWE-400: Uncontrolled Resource Consumption

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The product allows resource consumption without limits, enabling denial of service.

Abstraction
Class
OWASP Top 10
A05:2021 (#5)
Exploit Likelihood
High
Related CVEs
100

How to mitigate

Enforce quotas, timeouts, and input-size limits on every externally reachable operation.

▪ References & documentation

https://cwe.mitre.org/data/definitions/400.htmlNVD CWE listing

▪ How attackers exploit CWE-400

MITRE ATT&CK techniques associated with this weakness class (mapped via MITRE CAPEC). A vulnerability of this type could let an adversary carry out:

T1498Network Denial of ServiceimpactT1499Endpoint Denial of Serviceimpact

Step-by-step: how CWE-400 gets exploited

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.

  1. 1
    Impactimpact

    Cause damage — destroy, encrypt, deny, or manipulate.

    At risk / what's stolen

    Availability and integrity: ransomware encryption, data wiping, or service denial.

    How you defend

    Tested offline backups, integrity checks, and rate/abuse limiting.

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.

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