Despite these advances, six-digit OTPs remain ubiquitous for the foreseeable future, especially in SMS-based 2FA (despite known weaknesses) and legacy systems. Defending against wordlist attacks will continue to be a core requirement.
In each case, a simple wordlist of either all 1 million codes or common patterns would have been sufficient if not for proper rate limiting. These examples underscore why security professionals use wordlists in authorized testing to find such flaws before criminals do.
Several high-profile breaches have exploited weak OTP implementations:
The range of a complete wordlist spans from 000000 to 999999 . 2. Wordlist Structure and Types 6 digit otp wordlist
One-Time Passwords (OTPs) serve as a critical layer of authentication for banking, social media, and enterprise applications. While a six-digit numerical code provides one million unique combinations, the rise of automated testing and distributed computing has shifted how security professionals evaluate these authentication mechanisms.
This is why security professionals focus on eliminating predictable OTPs rather than worrying about full brute-force.
If you prefer to generate the list yourself rather than downloading a large file, you can use simple tools or scripts: : Despite these advances, six-digit OTPs remain ubiquitous for
Lock the user account or target phone number after 3 consecutive failed OTP attempts.
), which is considered low for high-security environments but sufficient for short-lived (30–60 seconds) session tokens. 4. Mitigation Strategies
Once the time step refreshes, the previous 6-digit code becomes entirely useless. An attacker would need to guess the correct code out of possibilities within that narrow time frame. Network Latency Wordlist Structure and Types One-Time Passwords (OTPs) serve
In the world of cybersecurity, a 6-digit OTP (One-Time Password) wordlist
With a conservative rate limit of 10 attempts per minute per account, a full 1M-wordlist attack would take – easily detected and blocked.