Pentester Guide: Addressing Weak or Default Credentials

weak credentials default passwords penetration testing security vulnerabilities credential stuffing
Pratik Roychowdhury
Pratik Roychowdhury

CEO & Co-Founder

 
September 18, 2025 5 min read

TL;DR

This guide dives into identifying and mitigating risks associated with weak or default credentials, a common entry point for attackers. It covers techniques for discovering these vulnerabilities using pentesting tools and manual methods, along with actionable strategies for remediation and prevention, focusing on enhancing security posture across your organization.

Introduction: The Persistent Threat of Weak Credentials

Okay, so, weak or default credentials? Still a HUGE problem. I mean, are people still using "password" as their password? Seriously! Let's dive into why this is still a thing and why it matters.

  • First off, weak passwords are like, the welcome mat for breaches. It's crazy how many incidents still trace back to something that simple.

  • Think about it—it's not just web apps. We're talking network devices, cloud services... basically anything that needs a login. And if they're compromised, uh oh.

  • Then there's compliance. Like, if you're dealing with credit card info, pci dss ain't gonna be happy if you're skimping on password security.

It's easy to think "it won't happen to me," but that's exactly what attackers are banking on.

Next up, we'll look at the common types of weak credentials that pentesters run into.

Discovery Techniques: Finding the Flaws

Ever wonder how many folks are still using "admin" as their password? Scary thought, right? Well, let's talk about how pentesters actually find these flaws.

  • First up: automated scanning tools. Think Nmap, Metasploit—the usual suspects. Pentesters configures these to scan specific services like ssh or that old web app no one ever updates. It's about finding those low-hanging fruit.

  • Then there's the manual stuff, like credential stuffing. This is when attackers take lists of usernames and passwords that have been leaked from other sites and try them on your systems. Yeah, pentesters use 'em too. It's crude, but it works more often than you'd think.

  • Don't forget default credentials. Seriously, so many devices ship with 'em. It's like leaving the front door unlocked. Bypassing login screens? Sometimes it's as easy as googling the default password for a specific model of router. Common ones include "admin/admin" or "root/password". These are super risky 'cause they're widely known.

It's kinda crazy how often these simple things are still effective. But hey, that's job security for us pentesters, i guess?

Next, we'll get into exploiting these default credentials once they're found.

Remediation Strategies: Securing the Perimeter

So, you've found some weak credentials. Now what? Time to lock things down, folks. It's not just about changing passwords (though, yeah, do that), but about building some real defenses.

  • First up: enforce strong password policies. I'm talking minimum length, complexity requirements—the whole shebang. Like, make sure people aren't using "Password123" anymore, okay? Healthcare orgs, for example, gotta be super strict to protect patient data, and retail sites need to protect customer credit card information.

  • Account lockout policies are your friend. Too many failed login attempts? Bam! Lock 'em out. Prevents those brute-force attacks, you know? It's like putting up a "no trespassing" sign for bots.

  • Credential management. Password managers are a must-have. And seriously, stop reusing passwords! It's like using the same key for your house, car, and office. Finance companies gotta be on top of this, what with all the sensitive data they handle.

Basically, it's like fortifying your digital castle.

Leveraging AppAxon for Enhanced Security Posture

AppAxon can help improve your security posture by continuously identifying and helping you manage credential-related risks.

  • Think of it as a security sidekick. AppAxon uses ai to spot potential weak spots in your credential management. It's like having a second pair of (digital) eyes.

  • It keeps an eye on your code and setups for any exposed credentials. you know, stuff that shouldn't be out in the open.

  • And here's the kicker: it tells you what to fix first, based on what's most likely to get exploited. No more chasing ghosts!

This helps you stay on top of things, especially when you're trying to integrate security into your development process.

Advanced Techniques: Going Beyond the Basics

Ever thought about setting traps for hackers? It's like something outta a spy movie, right? Let's talk about goin' beyond basic security with some sneaky techniques.

  • Honey accounts are fake user accounts designed to lure attackers. The idea is to make 'em look juicy, but they lead nowhere important. When someone tries to log in, bam! Alert the security team.

  • Deception technology takes it a step further. Think fake file shares or bogus databases. A hospital, for instance, might set up a fake patient record system to detect unauthorized access. If someone pokes around where they shouldn't, you know something's up.

  • Monitoring is key. You gotta watch those honey accounts like a hawk. Any activity is suspicious, and it can give you insights into what attackers are after. Financial institutions use this to protect customer data.

It's like setting up a digital minefield - pretty cool, huh? Now, let's get into spotting weird behavior with behavioral analytics.

Conclusion: A Proactive Approach to Credential Security

So, you've been patching up those credential holes, right? But security isn't a one-and-done thing, sadly. It's like, a garden – you gotta keep weeding.

  • Make sure you're always checking your systems. Healthcare orgs need to constantly monitor access to patient records, and finance companies got to watch those transactions.
  • Stay updated on the latest threats, alright? What worked last year might not cut it now.
  • Build a culture where security is everyone's job. When employees understand how to spot phishing attempts, for example, they become a crucial line of defense against credential compromise.

Think of it as a team sport, not just an it thing.

Pratik Roychowdhury
Pratik Roychowdhury

CEO & Co-Founder

 

Pratik is a serial entrepreneur with two decades in APIs, networking, and security. He previously founded Mesh7—an API-security startup acquired by VMware—where he went on to head the company’s global API strategy. Earlier stints at Juniper Networks and MediaMelon sharpened his product-led growth playbook. At AppAxon, Pratik drives vision and go-to-market, championing customer-centric innovation and pragmatic security.

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