In 2025, a study by Picus Labs showed that cyberattacks involving stolen or abused credentials from basic web applications nearly tripled compared to the previous year. These attacks involved cybercriminals systematically guessing passwords until they obtained access to a digital account, a method known as a brute force attack.

If you’ve ever wondered whether your accounts are truly secure, or if you’re still relying on passwords alone to protect your digital life, this surge in credential-based attacks makes it clear that defenses against brute force attacks are essential for anyone with a digital account.

Let’s take a close look at what counts as a brute force attack, the factors that drive their increase, and which defenses have become non-negotiable against them.

What Does a Brute Force Attack Mean?

A brute force attack is an automated, systematic attempt to guess passwords or cryptographic keys by methodically trying thousands of password combinations per minute, until they find the one that opens your door. 

Over time, attackers have learned that aggressive brute force attempts can trigger lockouts and alerts. To avoid this, modern password sprayers deliberately limit their attempts to a few tries per account per hour, and spread them across multiple IP addresses or countries to dodge detection thresholds.

Attackers also target less-monitored protocols where possible. By the time you notice something is wrong, attackers may have already tested thousands of credential combinations against your account in that system.

Brute Force Is Only the Beginning

Brute force attacks primarily provide the initial access to cybercriminals, but that is just the beginning. Once they gain entry, attackers can branch in multiple directions that can devastate individuals, businesses, and organizations. They might scrounge through your network looking for high-value data or additional accounts to compromise. They might deploy ransomware, taking your critical files hostage. They could exfiltrate sensitive customer or business data for sale or extortion. 

One incident in 2025 involved the U.S. Agency for International Development (USAID), where attackers used password spraying to access the agency’s systems and inject malware that hijacked cloud resources for cryptocurrency mining.

Beyond this high-profile case, other U.S. critical infrastructure and government agencies have been issuing alerts about brute force, password spraying, and even MFA bombing attacks to compromise accounts across the public and private sectors. These represent a coordinated, ongoing threat to federal agencies, state and local governments, and private companies.

High-Risk Targets

Among the targets that attackers are most keen on, login portals that are accessible on the internet top the list, especially those without additional security layers. For consumers, this means your email accounts, online banking, social media, cloud storage, and shopping accounts are all potential targets. Small and mid-sized businesses are also vulnerable because they frequently have weaker multi-factor authentication coverage, misconfigured lockout policies, or no monitoring systems for suspicious login patterns, compared with large enterprises that have dedicated security teams.

Common Types of Brute Force Attacks

Modern brute force attacks have become more dangerous as they are no longer just about bombarding one account with endless login attempts. Today’s brute force attacks encompass a whole family of sophisticated, automated, credential-guessing techniques. Attackers may vary in their methods, but the goal is always the same: gaining access to an account by guessing valid login credentials. Knowing these common variants will help you determine what protections to apply to stop them.

Password Guessing

This classic approach entails repeated attempts to crack a single account using many passwords or common patterns. Attackers might start with dictionary words, then add numbers and symbols in predictable ways, such as “Password1!”, “Password123!”, “P@ssw0rd!” until they succeed or get locked out.

Password Spraying

Instead of aggressively targeting one account, attackers test one common password, such as “Welcome2024!” or “Summer2025!” across many usernames. They might try just a few passwords per account per day, staying under lockout thresholds while casting a wide net.

Credential Stuffing

This method leverages the massive data breaches of recent years, where attackers simply test these known-valid credentials on other services. If you used the same password for your breached retail account and your bank account, credential stuffing is how attackers exploit that reuse.

The industry standard framework, MITRE ATT&CK, catalogs these techniques into specific sub-techniques that global security teams use to detect and defend against these attacks.

Effective Defenses Against Brute Force Attacks

While attackers rely on automation, weak passwords, and misconfigured systems, you can focus on effective defenses that break that equation by making guessed credentials useless and suspicious login activity easy to spot. Check out the suggestions below.

Strong Authentication

Multi-factor authentication (MFA) is one of the most effective countermeasures against brute force attacks. When enabled, MFA requires your password and a code sent to your phone, a hardware token, or a biometric factor. Even if attackers guess your password correctly, they still can’t get in without that second factor. App-based authenticators or hardware security keys provide much stronger protection. If possible, avoid using SMS-based codes, which can be intercepted by cybercriminals through SIM-swapping attacks. 

Enabling MFA on all your important accounts, especially email, banking, work, and cloud services, creates a powerful barrier that stops most brute force attacks.

Meanwhile, newly emerging phishing-resistant authentication and passkeys, which are cryptographic credentials stored on your device, remove traditional passwords from the equation entirely. When passwords don’t exist, password-guessing attacks become impossible.

Smart Password and Account Practices

Your password strategy matters as much as the passwords themselves. Using longer passphrases rather than short, complex passwords is both easier to remember and harder to crack.

A good solution for managing unique, strong passwords across all your accounts is a reliable password manager, which generates and stores passwords securely using AES-256 encryption. It also auto-fills credentials and synchronizes across all your devices, making strong security convenient.

While traditional rules have instructed us to create new passwords every three months, updated guidance now tells us to avoid periodic forced password changes unless there’s a specific reason to believe a password has been compromised. Those forced changes often lead people to make predictable modifications. For instance, “Summer2025!” becomes “Fall2025!” which attackers have learned to anticipate.

Another powerful, modern defense established by the National Institute of Standards and Technology is to screen your proposed password against a database of billions of previously breached credentials, and reject it if it has been previously compromised. This simple check prevents the most commonly guessed passwords from ever being used in the first place.

Network and Application Protections

Beyond individual account security, network and application layers offer additional defense opportunities.

A smart strategy is to create policies that define who can log in from where and when. In your policy, you can require MFA for logins from an unfamiliar location, block sign-ins from risky IP ranges or countries where you don’t operate, and restrict administrative access to managed, trusted devices only. These rules make brute force attacks harder to execute, even if attackers manage to guess a valid password.

Rate limiting and CAPTCHAs can also slow down automated attacks. If your login page limits attempts to five per minute with a CAPTCHA challenge after three failures, brute force tools become less effective. Web Application Firewalls can add IP reputation checks and geo-blocking rules to filter connection attempts from malicious sources.

Monitoring and Detection

You can take advantage of login alerts and security notifications that most major services now offer. When Google, Microsoft, or your bank sends you an alert about a login from an unrecognized device or location, investigate immediately and reset your password.

Identity monitoring services such as McAfee+ can alert you if your personal information, including passwords, email addresses, or financial data, appears on the dark web. The service will give you step-by-step guidance on how to secure your accounts and minimize the damage, turning the crisis into a manageable response.

The U.S. Regulatory and Legal Picture

U.S. cybersecurity agencies including the Cybersecurity and Infrastructure Security Agency (CISA) and the Federal Bureau of Investigation (FBI) have issued advisories against password spraying and brute force attacks, consistently emphasizing that multi-factor authentication, strong password policies, and active monitoring are baseline protections for every organization. For you as a consumer, this means “reasonable security” from your service providers.

Your Rights as a Consumer

When brute-force-driven breaches expose your personal data, organizations are required by law to notify you. Beyond just receiving a notification, you have rights. Courts and regulators are increasingly scrutinizing whether these organizations have safeguards in place when assessing fines and settlements, as well as determining negligence and remediation plans.

This legal framework gives you leverage. If a service you use doesn’t offer basic protections, you can demand better. If they experience a breach due to easily preventable brute force attacks, you are supported by the law. These protections empower you to hold companies accountable and make informed decisions about which services to trust and employ.

Final Thoughts

As we move through 2026 and beyond, brute force attacks won’t disappear. But their effectiveness drops sharply when you combine strong authentication, good password hygiene, sensible lockout policies, and active monitoring.

Looking forward, the most effective defense against brute force attacks is reducing or eliminating password dependence. Passkeys, FIDO2 hardware security keys, and other passwordless authentication methods represent the future of identity security. While the full transition will take time, planning and piloting these technologies on your accounts positions you for better security against brute force attacks.