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Home/CWEs/CWE-645
Common Weakness Enumeration

CWE-645: Overly Restrictive Account Lockout Mechanism

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The product contains an account lockout protection mechanism, but the mechanism is too restrictive and can be triggered too easily, which allows attackers to deny service to legitimate users by causing their accounts to be locked out.

Abstraction
Base
Related CVEs
0

▪References & documentation

https://cwe.mitre.org/data/definitions/645.htmlNVD CWE listing

▪ How attackers exploit CWE-645

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

T1531Account Access Removalimpact

Step-by-step: how CWE-645 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

▪ Related CVEs

No CVEs in the Gold index currently reference CWE-645. New matches appear here as the crawler indexes them.

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.