- Brute force attacks are one of the most persistent entry points into corporate accounts. In 2026, Sophos researchers found that brute-force activity (15.6%) is nearly level with exploitation (16%) as an initial access method.
- A brute force attack is an automated, high-volume method of guessing login credentials, PINs, keys, or authentication tokens to gain unauthorized access to accounts.
- In 2026, attackers don't rely on raw guessing. They use curated breach data, residential proxy networks, and AI-assisted pattern matching to stay below detection thresholds and look like normal traffic.
- Basic MFA is no longer a reliable backstop. Attackers now target the full authentication flow. OTP brute force, AiTM phishing, and session hijacking let them bypass second factors once they have valid credentials.
- The visibility gap is where your real exposure lives. Most small IT teams can't answer three questions with data they can point to: how many SaaS apps employees are actively logging into, which accounts have reused or compromised passwords, and whether any credentials have appeared in a breach in the last 90 days.
- LastPass closes that gap without a six-month rollout or dedicated security team. SaaS Monitoring is agentless and works through the browser extension. Vault encryption uses AES-256 at 600,000 iterations, making offline brute force against stored credentials computationally infeasible. SaaS Protect gives your team graduated access controls that don't kill productivity.
Brute force attacks are like flies in the summer. They aren’t especially particular about who you are; they’ll try every door or window. If you leave one open, they’ll get in. And like flies,brute force attacks aren’t a relic of the past. They're still here and one of the most active entry points into corporate accounts.
In 2026, they’ve become full-scale identity attacks that are a threat to business reputation and trust.
Last year, Expel researchers found that 68.6% of incidents they investigated turned out to be identity attacks, with 47.7% resulting in attackers gaining unauthorized access with stolen credentials.
In this guide, I explore:
- What a brute force attack looks like today
- How modern identity-based attacks work
- Why defenses (still) fall short
- How to protect your business with identity-centric security
What is a brute force attack?
First, let’s get definitions out of the way.
Brute force attack: A high-volume, automated, trial-and-error method of guessing login credentials (passwords) or other authentication secrets (PINs, keys, tokens, 2FA codes) to gain unauthorized access to accounts
And why are brute force attacks still one of the most common ways to get into accounts? Because the core problem hasn't changed: Most people still reuse passwords.
Attackers love this habit because it allows them to brute-force strategically, i.e. one reused password gets them into multiple accounts.
What’s changed, however, is the context. Attackers in 2026 don't leave password hacking to chance or “pure guessing” anymore.
Instead of relying on raw breach dumps, they snag leaked data from dark web data brokers that were professionally curated.
This is processed PII that’s undergone password frequency analysis and labeled with social media, geographic, & demographic tags. We’re talking about higher-value data sets, called “fullz” profiles, that can be weaponized for identity theft and account takeovers.
It’s become quite clear: These aren’t your brute force attacks of yesteryear.
How have brute force attacks changed in 2026?
Brute force attacks have changed in scale, speed, and sophistication in 2026. They’re smarter and harder to detect.
What’s actually changed and why it matters to you
Automation. The brute force attacks of yesteryear left little to the imagination. Attempts from a small number of IPs, a rapid succession of failed login attempts, you get the picture.
They were “bull-in-a-China-shop" obvious.
Today's attacks route through millions of residential IPs, mimic human behavior, and target accounts rule-based tools don’t pick up, i.e. the 67% of corporate Gen AI logins done with personal emails.
Attackers use smart automation to test logins at scale, detect actions that trigger alerts, and stay below lockout thresholds.
In other words, today’s attacks are much more subtle and designed to look like normal traffic. In a remote and SaaS-first world, traditional on-prem defenses fall short.
Speed & scale. While older attacks were limited by compute power, today’s attacks are anything but. Attackers can now offset that limitation with high-end GPUs* (built for massive parallel computation), botnets, and smart automation.
* High-end GPUs can perform hundreds of billions of password guesses per sec, but only when attacking outdated hashing algorithms like MD5 or SHA‑1*
Sophistication. Previous attacks were trial-and-error based, where attackers tried all combinations blindly. In contrast, today’s attackers use AI-assisted pattern-based guessing to predict likely passwords.
Are you actually exposed to a brute force attack right now?
Start with three honest questions before reading further:
- Do you know how many SaaS apps your employees are actively logging into?
- Can you see which accounts have reused or compromised passwords across your system?
- Do you know whether any employee credentials have appeared in a breach in the last 90 days?
Most teams can't answer all three with data they can point to. That visibility gap is what attackers actively target.
Why are brute force attacks now identity-based attacks?
While attackers can use AI-generated malware for campaigns (and they do), using brute force to target identities is easier when the goal is to get in quickly with minimal effort.
In 2026, Sophos researchers found that brute-force activity (15.6%) is now almost level with exploitation (16%) as an initial access method.
Brute force attacks are no longer isolated but part of broader identity-centric security threats. Attackers are relying on valid accounts to gain initial access because it lets them bypass perimeter defenses.
This shift is driving the need for identity-first security, where identity hygiene, credential visibility, and MFA enforcement become the new frontline for enterprise defense.
What are the top brute force attacks most relevant to small and midsized businesses in 2026?
The top brute force attacks most relevant to small and midsized businesses are password spraying, credential stuffing, and OTP brute force.
#1 Password spraying: Trying common passwords across a large number of accounts, staying below lockout thresholds. Password spraying is an increasingly automated industrial scale operation running against every exposed surface, including SaaS, non-SSO platforms, and VPNs.
#2 Credential stuffing: Using known username/password combos harvested from previous leaks. The first credential stuffing attack ISECTECH experts triaged in 2026 used 4.2 million credential pairs harvested from a dozen breaches.
The attackers routed traffic through a residential proxy network that mimicked the geographic profile of the customer base.
Credential stuffing is increasingly AI-assisted and stealthy.
Despite its low success rate (0.2% to 2%), attackers favor it because it requires minimal expertise and can be used as a springboard for other types of fraud, such as new account fraud, where they open more fraudulent accounts in your name to take advantage of free trials, API access, and sign-up bonuses.
Check out our blog on the difference between password spraying and credential stuffing.
#3 OTP brute force: Low‑and‑slow, distributed guessing campaigns that target not just passwords but other authentication secrets like OTPs (one-time passwords).
The typical OTP is six digits, which means attackers can try up to 1,000,000 combinations. If strong protections like rate limiting per user/identity (alongside IP-based controls) aren’t in place, they could successfully brute force the code within the 30-60 second validity window.
Does basic MFA stop brute force attacks?
Basic MFA alone doesn’t stop brute force attacks, no. It does raise the cost of success, but that’s all.
Attackers are now focused on initial access via valid credentials first, rather than starting out by trying to break the second factor.
First, they make distributed brute force attempts via residential proxies.
Once they get your credentials, they pivot to MFA bypass techniques like AiTM (adversary-in-the-middle) phishing, session hijacking, SIM swapping, or MFA fatigue (push bombing) to access your accounts.
So, MFA is no longer the only target. It’s the entire human authentication flow attackers are after.
Google’s disclosure on May 11, 2026, was a major turning point.
On that day, the Google Threat Intelligence Group disclosed the first known zero-day 2FA bypass built with AI-generated code.
The Python exploit allowed 2FA bypass on a popular open-source, web-based system admin tool. This meant attackers could get in using only valid user credentials.
With AI compressing the timeline from vulnerability discovery to exploitation, basic MFA like SMS, OTP, and push notifications are especially vulnerable. They can be easily intercepted, which is why modern identity-centric security requires layered controls.
LastPass strengthens this stack of controls at its most vulnerable point: credentials and access.
By integrating with IdPs and Zero Trust frameworks and providing phishing resistant FIDO2 MFA support (passkeys & hardware security keys), secure credential management, and real-time SaaS monitoring, LastPass extends your visibility and control in the browser.
This is critical, because in a SaaS-first world, this is where your employees log in and access the tools they need to do their jobs. It’s also where they unintentionally expose your organization to risk.
Is rate limiting no longer enough to stop brute force attacks in 2026?
The answer is, rate limiting still works, but the type you use matters.
IP-only rate limiting was built for an earlier threat model, one where attackers generated high volumes of traffic from a small number of sources.
In 2026, attackers no longer “live” in just one or several IPs. Modern brute-force attacks are distributed across thousands of IPs and proxies, operate at low frequency, and are designed to blend into normal user behavior.
Each individual request looks legitimate and stays below detection thresholds, but overall, the attack is massive.
For 2026, rate limiting still works, but only if it’s identity-aware and adaptive, not just per-IP.
In other words, without layered (or multi-dimensional) rate limiting controls and identity-based protections, OTP brute forcing could be successfully carried out.
Here’s a quick table for reference.
|
Rate Limiting Type |
What It Does |
Why It Matters |
|
Identity‑based (per user) |
Limits attempts per username |
Stops distributed attacks that rotate IPs and target the same user |
|
Multi‑dimensional (layered) |
Applies simultaneous limits: user, endpoint, IP address, device, session, geography |
Lets you block by multiple signals at once, so even if attackers evade one control, another stops them |
|
Adaptive |
Dynamically adjusts limits based on user behavior, device, location |
Static thresholds are predictable and easily bypassed |
|
Progressive |
Escalates controls (delay → CAPTCHA challenge → MFA prompt → lock) |
Balances security and user experience while slowing attackers |
|
OTP‑specific |
Strict limits on OTP attempts |
Prevents brute forcing of short OTP codes |
Sources: Cloudflare Developer, Friendly CAPTCHA
How does identity-first security change the defense picture?
Identity-first security treats credential security as the primary control. It shifts the defense from blocking traffic to continuously verifying trust at the user level.
Identity-first security: An approach that places credential integrity, authentication controls, and access visibility at the center of a security program, rather than treating identity as secondary to network security.
The traditional model was network-first
- It focused on IPs, firewalls, and perimeter controls
- Assumed threats came from “outside”
- And it relied heavily on static controls like per‑IP rate limiting
The identity‑first security model meets our 2026 reality
- It treats identity (the user) as the primary security boundary
- It focuses on who is accessing what, not just where traffic comes from
- And it evaluates every login attempt for risk
What specific controls does identity-first security require?
Identity-first security requires controls centered on authentication and behavior.
- Core identity-based access controls: This involves strong authentication as a baseline, with phishing resistant FIDO2 MFA (passkeys, hardware security keys) for corporate accounts.
- Rate limiting stack: This is where you limit authentication attempts per user, combined with adaptive, progressive, and OTP controls (as seen in the previous table) to protect against modern brute force attempts.
- SaaS access security: This is where you empower your IT team with the visibility they need to enforce stronger authentication across your SaaS environment.
See what real business owners have to say about identity-first security, access controls, and the simple solutions most SMBs are missing
My biggest fear is AI-powered attacks outpacing traditional defenses. Most SMBs still rely on basic antivirus and firewalls. Small businesses simply can't afford the advanced tools to catch these threats.
The struggle comes down to talent and budget. The cybersecurity talent shortage hit 4 million unfilled positions globally last year. For a 50-person company, hiring a full-time security analyst at $120,000 is just not realistic. I know because I've talked to dozens of business owners who have to choose between paying for security or paying for growth.
We need simpler tools. That's the hope. Tools that don't require a PhD to configure. If we can bring enterprise-grade security to a $2,000 annual budget, we'll start closing the gap.
Ruth Jennifer Cruz, founder of WolfKingUSA, a manufacturer of PC gaming peripherals
For SMBs, the challenge is especially difficult because they often face the same threats as large enterprises but with smaller teams and budgets. Ransomware, credential theft, and exploitation of unpatched systems remain some of the most common attack paths. In many incidents we analyze, basic security hygiene, such as timely patching, asset visibility, and access control, would have significantly reduced the risk.
The organizations that will be most successful are those that focus on fundamentals while embracing automation. Cybersecurity is becoming less about collecting more tools and more about operationalizing security effectively across the entire environment.
Peter Barnett, VP of Product Strategy at Action1, a cybersecurity and IT company specializing in endpoint security and automated patch management
In my view, credential management and SaaS visibility are the foundation because they answer two critical questions for SMBs: who has access, and what tools are being used. But to turn scattered signals into action, SMBs also need a few complementary layers that help them detect, verify, and respond faster.
First, email security and phishing detection are essential, because many SMB attacks still begin with an inbox: a fake vendor message, a payment request, a password reset, or an impersonation attempt.
Second, endpoint protection and device monitoring matter because access decisions are only as strong as the devices being used. If an employee’s laptop or phone is compromised, credential controls alone may not be enough.
Third, SMBs need simple identity and access rules: multi-factor authentication, role-based access, offboarding checklists, and periodic access reviews. These do not have to be complex, but they must be consistent.
Finally, I think the most overlooked layer is a lightweight decision workflow. When something suspicious happens, the business should know exactly what to do: who verifies it, what must be checked, when to pause a payment or login, and when to escalate. For SMBs, protection is not only about having more tools. It is about combining the right tools with clear decision rules that reduce hesitation under pressure.
Bar Yaron Harir, founder of YNALIZE, a digital market intelligence and research firm
For tools, I’ve noticed a shift towards integrated platforms that combine endpoint security, identity management, and threat intelligence. The challenge is that many SMBs adopt piecemeal solutions, which creates gaps attackers exploit.
Consolidation and governance are becoming just as important as the tools themselves...Cyber intelligence is also under-utilized.
Many smaller businesses don’t invest in monitoring Dark Web chatter or breach data, yet that’s often where early warnings appear. Even basic subscription services can provide signals that help prevent costly incidents.
Amit Rajdev, founder and CEO of Devotion Commerce, a full-service digital marketing and e-commerce agency
The pattern across every perspective above is the same: You can get security right without a big budget. Start with the basics: credential security and SaaS visibility as the primary control layer.
No, you can't audit every login or manually track every new tool someone signs up for with their work or personal email. And you definitely can't “do” access review from a spreadsheet while also handling everything else on your plate.
But that’s where LastPass makes your life easier (and safer).
How does LastPass support an identity-first security strategy?
LastPass supports an identity-first security strategy through effortless identity-based access controls and SaaS access security. And you can have it without a Fortune 500 budget or dedicated security team.
With LastPass, you get:
- SaaS and AI discovery (LastPass SaaS Monitoring) to surface what’s being used in the browser
- Dark Web Monitoring to flag compromised credentials before an attacker uses them
- Controlled access for every user (LastPass SaaS Protect) to apply access controls by risk level, so you aren’t choosing between a blanket ban or doing nothing at all
- Simplified, secure sign-ins (credential management, SSO, FIDO2 MFA) for every business + vault encryption using AES-256 with PBKDF2-SHA-256 at 600,000 iterations, making offline brute force attacks against stored credentials computationally infeasible.
With the above, LastPass gives you the browser-based access controls you need to retain your competitive edge in a remote and SaaS-first workplace.
See how IT EBC Financial Group and Northland Communications manage credential risk across SaaS apps without adding headcount. And then try it for yourself with a free LastPass Business trial.
LastPass vs. full IAM: What makes the difference for small teams?
LastPass makes a difference for small teams because it secures real‑world access immediately, covering all apps, credentials, and users, while a full IAM suite only protects what’s fully integrated.
|
Capability |
LastPass Business Max |
Okta Workforce Identity |
|
SSO coverage across all SaaS apps
|
Yes, provides centralized identity enforcement for SSO-integrated apps + coverage for non‑SSO and shadow apps via credential-level controls and browser-based visibility and monitoring.
|
No; only apps integrated with SSO |
|
Policy enforcement across apps |
Strong for credentials + FIDO2 MFA
|
Strong for integrated apps only |
|
Deployment complexity |
Low; agentless, no added infrastructure requirements
|
High; requires significant expertise for deployment and management |
|
Time to value |
Immediate visibility once employees sign in; no integration required
|
Slow; requires integration + configuration |
|
Best fit |
SMBs needing fast, broad identity security with minimal IT overhead
|
Enterprises with dedicated IAM teams and full SSO coverage |
Note: Comparison is representative, not exhaustive and current as of June 2026
Enterprise IAM suites are built for organizations with dedicated security teams and the budget to match.
But if you’re a smaller team, that’s not the reality.
You’re dealing with:
- Dozens to hundreds of SaaS apps
- Employees logging in from different devices and locations
- A mix of SSO and non-SSO apps
LastPass complements full IAM suites like Okta and Entra ID by enhancing their identity management capabilities with credential security, ensuring complete coverage across both SSO and non-SSO apps.
With LastPass, you get identity-first security at the point of access and protection for both SSO and non‑SSO logins.
To get immediate visibility into your team’s credential and SaaS exposure, unlock your LastPass trial now.
Sources
IBM: What is a brute force attack?
Computational Efficiency of Brute-Force Attacks on Hashing Algorithms (2025)
USENIX: Password guessing using LLMs (2025)
HUMAN Security: 2026 State of AI Traffic Report
Cloud Security Alliance: AI-Generated Zero-Day: First Confirmed 2FA Bypass for Mass Deployment (2026)
Stripe.Credential stuffing: How this attack works and how to defend against it (2026)
