# Brute Force Attack

**MITRE ATTACK layer: Credential Access**

A brute force attack is an authentication attack where an attacker systematically attempts multiple username and password combinations to gain unauthorized access to systems or accounts.

## How is Brute Force Attack abused

Attackers use automated tools to rapidly test credential lists obtained from data breaches, password dumps, or commonly used passwords against exposed login interfaces and services.

## Why Brute Force Attack matters

Weak or reused credentials can lead to account takeover, privilege escalation, and full system compromise, often serving as an entry point for broader attacks like malware or ransomware.

## Real-world example

### Massive VPN Credential Attack Using Millions of IPs

In early 2025, threat researchers observed an ongoing brute force attack campaign leveraging nearly 2.8 million source IP addresses daily to target VPNs, firewalls, and network devices from multiple vendors including Palo Alto Networks, Ivanti, and SonicWall. Attackers repeatedly guessed login credentials to gain unauthorized access to network infrastructure, highlighting the global scale and automation of brute force intrusion attempts.

[Source](https://www.bleepingcomputer.com/news/security/massive-brute-force-attack-uses-28-million-ips-to-target-vpn-devices/?utm_source=chatgpt.com)

## Related topics

### Privileged User Compromise

[Read more](https://www.manageengine.com/products/desktop-central/attack-glossary/privileged-user-compromise.html)

### OAuth / API Token Abuse

[Read more](https://www.manageengine.com/products/desktop-central/attack-glossary/oauth-api-token-abuse.html)

### Malware

[Read more](https://www.manageengine.com/products/desktop-central/attack-glossary/malware.html)

## Additional Resources

### Achieve 442% ROI and reduce patching time by 95% — Forrester TEI Report

See how organizations gained 442% ROI and major efficiency improvements with Endpoint Central.

[Read more](https://www.manageengine.com/products/desktop-central/forrester-total-economic-impact-uems.html?utm_source=ec-attackglossary)

### Experience enterprise-grade protection proven in real-world tests — AV-Comparatives Report

Discover how Endpoint Central’s antivirus earned recognition through rigorous, real-world security validation in just eight months.

[Read more](https://www.manageengine.com/products/desktop-central/malware-protection-av-comparatives-dec2025.html?utm_source=ec-attack_glossary)

### Simplify endpoint security and build cyber resilience — Endpoint Security For Dummies

Get a clear, practical guide to understanding threats and strengthening your organization’s security.

[Read more](https://www.manageengine.com/products/desktop-central/endpoint-security-for-dummies.html?utm_source=ec_attack-glossary)