Mitigating human error in cybersecurity: Top internal threats to your organisation and how to stop them

Cybersecurity technology is evolving rapidly, but there’s one vulnerability that remains ever-present: people. Human error continues to account for the vast majority of data breaches and security incidents; even the most sophisticated technical controls can be rendered useless by a single careless click or poorly chosen password.

These mistakes can have severe consequences. A misdirected email might expose customers’ private information, a rushed response to a phishing attempt could give attackers access to internal system, or a neglected software update might open the door to ransomware. The financial, reputational and operational impact of blunders like these can be catastrophic, especially for SMEs.

But it’s not a matter of pointing fingers. Rather, it’s about understanding the nature of human error, recognising the risks it presents and putting the right strategies in place to reduce them. The right approach to human error can do a great deal to protect organisations from security breaches.

Human error: the overlooked cybersecurity threat

Before you can take measures to reduce the risk of human error, it’s important to understand how it can manifest. Here are some of the most common internal threats organisations are faced with – and why they’re so dangerous.

Phishing and social engineering

Phishing remains one of the most common and effective ways for attackers to breach organisations’ defences. Despite frequent awareness campaigns, many employees still fall for emails, texts or other messages that appear to come from trusted but are in fact designed to steal credentials, deliver malware or trick recipients into transferring funds.

Even experienced employees can be caught off guard by a well-crafted phishing attempt. Attackers often encourage action before critical thinking can kick in. These messages are becoming more convincing, better targeted and harder to detect. A single click on a malicious link can compromise an entire network; attackers often only need one set of stolen credentials to gain a foothold.

Weak or reused passwords

Weak passwords remain one of the easiest methods of gaining access to a business’s systems. Many employees still rely on simple passwords that are easy to guess, or reuse the same ones across multiple accounts. This leaves them, and their employer, vulnerable to credential stuffing attacks, where passwords stolen in one breach are used to gain access to other accounts and services.

Even with multi-factor authentication (MFA) in place, poor password hygiene can render it much less effective. Attackers can exploit weak passwords to bypass security controls, access sensitive data or escalate privileges within the network. In many breaches, compromised credentials leave the door wide open.

Misdelivery and misconfiguration

Not all data breaches are the result of malicious intent. The root cause may be something as simple as sending an email to the wrong recipient or failing to check access permissions on a shared folder. These accidental exposures are more common than many organisations realise and can have significant consequences, particularly under data protection laws like GDPR.

Similarly, misconfigured cloud storage, databases or collaboration tools can leave sensitive information exposed to anyone who has the right link or, worse, to the public internet. Mistakes such as these are often made under time pressure or due to a lack of understanding about security settings and how they work.

Shadow IT and unauthorised tools

Employees often adopt their own tools to make work more efficient, whether it’s a messaging app, a file-sharing service or something else. The intent may be perfectly innocent, but these unauthorised solutions – known as “shadow IT” – effectively bypass security controls and can introduce blind spots into an organisation’s security posture.

Without visibility into where data is being stored or shared, IT teams cannot properly monitor for threats, enforce compliance requirements or respond quickly to incidents. Shadow IT also increases the risk of data leakage and makes it difficult to maintain consistent security standards.

Insider negligence and policy non-compliance

Even the most fine-tuned, detailed security policies are no good if they’re not adhered to. But employees sometimes bypass controls they consider inconvenient, disable security features to speed up tasks, or ignore procedures because nothing bad has happened before. This mindset, often driven by a misunderstanding of the risks involved, can leave organisations badly exposed.

While negligence isn’t always (or even usually) deliberate, the impact is the same as if it was. From storing sensitive data on personal devices to using unencrypted USB drives, these small, usually unnoticed acts of non-compliance can create significant security vulnerabilities.

Lost or stolen devices

With the rise of hybrid and remote working, laptops, smartphones and tablets are continually on the move. If these devices are lost or stolen, particularly if they aren’t encrypted or protected with strong authentication, they can give attackers a direct route into an organisation’s systems.

A misplaced laptop can expose confidential client information, intellectual property or credentials stored in browsers and applications. Without robust controls in place, a single lost device can translate into a major security incident.

Creating a people-focused security strategy

Although it’s impossible to eradicate human error entirely – it’ll always be a factor – it is possible to significantly reduce its likelihood and impact. The key to this is to develop a security strategy that takes human fallibility into consideration, and which recognises people both as the greatest potential risk to security and its most effective defence.

Security awareness and continuous training

Traditional, once-a-year security training just isn’t sufficient. Employees quickly forget what they’ve learned if it’s not reinforced, and attackers are continuously updating their methods and techniques. Instead, organisations should adopt ongoing, engaging cybersecurity training programmes that build awareness and keep security at the forefront of employees’ minds.

Interactive simulations, such as phishing tests, can help staff recognise and respond to real-world threats. Training should go beyond the technical aspects and explain the “why”, “how” and “what”: why strong passwords matter, how attackers exploit human behaviour and what the consequences of a potential breach could be. When people see the bigger picture, they’re more likely to act properly.

Strong policies and clear communication

Effective security policies are essential, but they have to be practical, comprehensible and clearly communicated. Long, jargon-filled documents are likely to make people’s eyes glaze over. Instead, policies should be concise, easily digestible and tailored to different roles within the organisation.

It’s also important to explain the reasoning behind policies. Employees are much more likely to follow security procedures when the purpose behind them makes sense. Leadership should model good security behaviour and reinforce expectations regularly, so policies become part of the organisational culture rather than an afterthought.

Technology that supports people

Technology is inevitably central to any cybersecurity strategy, but its role should be to support and enable security-focused behaviour rather than replacing it. Tools like password managers reduce the cognitive load on employees and encourage better password hygiene. MFA adds an extra layer of protection even credentials are somehow compromised.

Endpoint protection, encryption and remote wipe capabilities safeguard devices if they’re lost or stolen. Data loss prevention (DLP) solutions and access control policies limit the damage if data is mishandled. The key is to choose tools that are user-friendly and integrate seamlessly into workflows so that they enhance security without causing friction.

A security-first culture

Perhaps the most effective defence against human error is a working culture that prioritises security at every level, where every member of the team understands their own responsibilities and what’s expected of them. This involves making cybersecurity a shared responsibility, rather than a task that’s delegated to the IT team to handle on its own.

Encourage employees to speak up if they make a mistake or notice something suspicious, without fear of blame or retribution. Recognise and reward security-conscious behaviour and make security a regular topic of discussion in team meetings and company communications. When cybersecurity is embedded into your organisation’s DNA, it becomes second nature.

The value of external support

Even where robust internal processes are in place and the workforce is security aware, organisations can still benefit from having external support on hand. A trusted cybersecurity partner can provide expertise, technology and monitoring that goes beyond what’s generally possible in-house. They can also design and deliver training programmes, review policies and identify vulnerabilities sooner.

Cybersecurity partners can also offer 24/7 threat monitoring, incident response support and ongoing guidance as threats continue to evolve and proliferate. By partnering with these experts, your organisation can stay ahead of emerging risks and ensure that human error, while still inevitable, does not become a critical weakness.

Making your workforce your first line of defence

Human error will always be a factor in cybersecurity. People make mistakes; they always have and always will. But with the right training, culture, technology and support in place, these inevitable errors don’t have to lead to costly and damaging security breaches.

By understanding the most common internal threats and taking proactive measures to address them, your organisation can transform its workforce from a vulnerability into its greatest cybersecurity asset. Rather than just being a matter of keeping attackers out, cybersecurity is about empowering people to make the right decisions based on a clear understanding of the risks they face every day.

Once you’ve achieved that level of understanding across your team, human error becomes less of a threat and more a manageable risk. It needn’t be the case that your workforce is your Achilles heel; rather, it can be an effective, vigilant watchdog against cybercrime. At Solsoft, we take pride in helping our clients – including SMEs and not-for-profit organisations – to get the most out of IT. That includes helping you take pre-emptive action to deal with IT vulnerabilities before they can become a serious problem. Get in touch today to find out more.

At Solsoft, we take pride in helping our clients – including SMEs and not-for-profit organisations – to get the most out of IT. That includes helping you take pre-emptive action to deal with IT vulnerabilities before they can become a serious problem. Get in touch today to find out more.