Is Everything Connected to the Internet Hackable?

Is Everything Connected to the Internet Hackable?

Think about the last device you connected to the internet.

Perhaps it was your phone. Your laptop. A television, a security camera, or a new router you installed at home.

You probably spent a few minutes setting it up, entered a password, and moved on.

You almost certainly didn't ask a more uncomfortable question: What would it take for someone else to gain control of it?

It's a question worth asking, because internet connectivity has quietly become a feature of almost everything. Our homes, vehicles, offices, hospitals, and factories depend on devices that communicate with systems we rarely see and barely understand.

We trust those systems to keep working. We trust them with personal information, private conversations, financial transactions, and sometimes our physical safety.

But how much of that trust is justified?

The popular claim that anything connected to the internet can be hacked is compelling. It is also more complicated than it sounds.

To understand why, we need to examine what hacking actually requires, where security fails, and why even sophisticated defenses cannot make every risk disappear.

The Internet Doesn't Automatically Make a Device Vulnerable

Connecting a device to the internet does not, by itself, give an attacker control over it.

There is an important distinction between a device being reachable and a device being exploitable.

An attacker generally needs a way to cross a security boundary. That might involve a software vulnerability, stolen credentials, an insecure configuration, a compromised service, or a person being deceived into granting access.

A properly secured device may reject unauthorized requests. Its services may be protected by authentication, its operating system may receive regular security updates, and its network may prevent unwanted connections.

Those protections matter.

A vulnerable service that cannot be reached by an attacker presents a different risk from the same service exposed directly to the public internet. Similarly, a stolen password may be far less useful when an account requires phishing-resistant authentication.

Security is not simply present or absent. It exists in layers, and those layers determine how difficult an attack becomes.

This is why the statement "everything can be hacked" needs qualification.

We cannot reasonably prove that every connected system contains a vulnerability that a particular attacker can successfully exploit. Some systems may resist every feasible attack available to an adversary.

What we can say is that connecting a device introduces relationships, dependencies, and potential attack paths that must be understood and defended.

And sometimes the weakest of those paths is not the device itself.

The Weakest Point May Be Somewhere Else

Imagine a company operating a well-maintained internal system.

Its software is updated. Its databases are encrypted. Its network is monitored, and its administrators use strong passwords.

An attacker looking for a traditional software vulnerability might struggle to find a useful opening.

But the company also employs people.

One employee receives a convincing message that appears to come from the IT department. The message asks them to approve a login request or enter credentials into a familiar-looking page.

The employee complies.

If the deception succeeds, the attacker may gain access through a legitimate account without exploiting the application's code at all.

From the system's perspective, the initial login might resemble an ordinary authorized session.

The software does not have to be broken for the security of the organization to be compromised.

This distinction is central to modern cybersecurity. Attackers do not necessarily choose the most technically impressive route. They look for a route that works.

A poorly protected account, a forgotten service, an overprivileged employee, or a vulnerable supplier can sometimes provide access that would be difficult to obtain by attacking the primary system directly.

Even encryption has boundaries.

Encryption can protect information while it travels across a network or remains stored on a device. But when an authorized application decrypts information to use it, the application and the identities allowed to access it become part of the security problem.

If an attacker takes control of an authorized account or endpoint, encryption alone may not prevent them from seeing information available to that account.

Strong cryptography is essential. It is not a substitute for securing everything around it.

What the Equifax Breach Actually Taught Us

In 2017, Equifax, one of the largest credit reporting companies in the United States, suffered a breach that exposed personal information belonging to approximately 147 million people.

The scale was extraordinary. But the underlying failure was painfully ordinary.

According to the U.S. Federal Trade Commission, Equifax failed to apply a critical security patch to a vulnerable system after receiving an alert.

The company's security team had directed that affected systems be patched. The necessary follow-up did not ensure the work had actually been completed.

Attackers exploited the vulnerability, gained entry to the company's network, and accessed sensitive information. Investigators also found that exposed administrative credentials and inadequate network separation helped the attackers reach additional data.

This was not evidence that encryption had suddenly become useless or that an entirely new form of computing had made defenses obsolete.

It was a failure involving an existing vulnerability, a missed security update, and weaknesses that allowed one compromise to become much larger.

The lesson is uncomfortable because it is so practical.

A company can have formal security procedures and still fail to carry them out. It can invest in protective technology while overlooking an exposed service. And a vulnerability affecting one component can have consequences far beyond that component if access is not properly restricted.

The Equifax breach demonstrates how small operational failures can combine into a catastrophic outcome.

It does not prove that every system is destined to be compromised.

It proves that the distance between a known risk and a real-world disaster can be shorter than we would like to believe.

There Is a Difference Between a Vulnerability and a Successful Hack

The word vulnerability is often used as though it means an attacker can immediately take control of a device.

That is not necessarily true.

A vulnerability is a weakness that may be exploited under certain conditions. Whether an actual attack succeeds depends on much more than the existence of the weakness.

An attacker may need access to a particular network, knowledge of the affected software, specific permissions, or the ability to combine several weaknesses.

Some vulnerabilities are relatively easy to exploit. Others require highly specialized knowledge, unusual circumstances, or resources that most attackers do not possess.

And even a successful exploit does not automatically mean complete control.

A weakness that allows an attacker to read limited information is different from one that grants administrative privileges. A compromised smart light bulb is not equivalent to unrestricted access to every computer in the house.

The boundaries between systems matter.

Good security architecture tries to ensure that when one component fails, the damage remains limited.

This principle is sometimes called limiting the blast radius of an incident.

It means separating systems, restricting privileges, protecting sensitive information, and avoiding situations where a single stolen credential gives access to everything.

A breach may still happen. But the difference between one compromised account and an entire compromised organization can come down to how those boundaries were designed.

Why Perfect Security Is So Difficult to Promise

Consider how much software exists inside an ordinary connected device.

There may be an operating system, wireless networking components, applications, third-party libraries, cloud services, and mechanisms for downloading updates.

Each component may be developed by different people, maintained on a different schedule, and connected to services operated by other organizations.

Security must account for the behavior of the whole system, not merely one application or one line of code.

A device can be secure against known attacks today and face new risks tomorrow.

New vulnerabilities are discovered. Software changes. Credentials are exposed. Organizations replace suppliers. Employees make mistakes. Features are added without fully anticipating how they might interact with older components.

None of this means security engineering is futile.

Quite the opposite.

Modern engineering can eliminate entire categories of defects, reduce opportunities for unauthorized access, and make successful attacks considerably more difficult.

But the complexity of real systems makes an unconditional promise of permanent safety difficult to defend.

This is why the U.S. National Institute of Standards and Technology frames cybersecurity around managing risk.

Risk management requires understanding what needs protection, which threats matter, how likely different failures are, and what consequences they could produce.

A system protecting a personal photo collection does not face exactly the same threat model as a hospital, a bank, or a national power grid.

And an attacker with limited technical knowledge does not have the same resources as a well-funded criminal organization or a state-sponsored group.

The relevant question is not simply whether a system is hackable.

It is whether an attacker has a realistic path to compromise it—and whether the protections in place make that path sufficiently difficult.

What About Devices That Are Not Directly Accessible?

A common assumption is that a device is safe if nobody can reach it directly over the internet.

Keeping services inaccessible from the public internet can significantly reduce exposure. It is often an excellent security decision.

But direct internet access is not the only way an attacker might reach a system.

A device may communicate with a cloud platform. It may accept updates from a manufacturer. It may share a local network with other devices. It may be managed through a companion application on a smartphone.

Each relationship creates another dependency.

An attacker who compromises a cloud account, a management interface, or a trusted computer may gain opportunities that were unavailable through a direct connection.

This does not mean every smart home is one click away from disaster. It means the security of a connected device cannot always be evaluated by looking only at that device.

A security camera, for example, might have excellent firmware protections while its cloud account is secured by a reused password.

The camera's hardware may be functioning exactly as designed. Yet the account controlling access to its footage could still be compromised.

The vulnerability, in that case, is part of the wider system rather than a flaw in the camera's electronics.

That distinction becomes increasingly important as more everyday objects depend on remote services.

The Industry Is Moving Away From Automatic Trust

For years, organizations relied heavily on the idea that their internal networks were safer than the internet outside.

The network perimeter was treated as a protective boundary. Once a device or user was inside, certain kinds of access were easier to obtain.

That approach became harder to defend as organizations adopted cloud computing, remote work, mobile devices, and interconnected services.

In 2020, NIST published its Zero Trust Architecture guidance, describing a security approach that avoids granting implicit trust solely because a user or device is inside a particular network.

Under this approach, access decisions are tied to identities, devices, permissions, and the resources being requested.

The principle is not that every person is malicious.

It is that being inside a network should not be enough to establish trust.

A compromised laptop inside an office can be dangerous. So can a stolen employee account used from another country.

Modern defenses increasingly focus on verifying access, limiting privileges, and treating compromise as a possibility that systems must be prepared to contain.

This approach acknowledges a fundamental truth about security: prevention is important, but a defensive strategy must also consider what happens when prevention fails.

Can We Make Connected Technology Safer?

Absolutely.

It would be a mistake to interpret uncertainty as proof that protection is pointless.

Many successful attacks take advantage of weaknesses that organizations and individuals can address.

Manufacturers can design products without universal default passwords. They can reduce memory-safety vulnerabilities, provide dependable security updates, and make safer configurations the default.

Organizations can restrict administrative access, separate critical systems, monitor suspicious activity, maintain backups, and respond promptly to known vulnerabilities.

Individuals can install updates, use unique passwords, enable phishing-resistant authentication where available, and remove devices or applications they no longer trust or need.

None of these measures guarantees immunity.

Together, however, they can dramatically change an attacker's options.

A well-defended system may require substantially more expertise, time, and resources to compromise. It may detect an intrusion earlier. It may prevent an attacker from moving beyond one account or device.

The goal is not to pretend failure is impossible.

It is to make failure less likely—and less damaging when it occurs.

This is also why responsibility cannot rest entirely on the person using a product.

A consumer should not need to be a cybersecurity engineer to install a home camera safely. A small business should not have to discover that critical security settings were disabled by default.

Security has to begin with the people and organizations designing the technology, not only with the customers expected to operate it.

So, Is Everything Connected to the Internet Hackable?

The most accurate answer is not a simple yes or no.

Connecting something to the internet does not prove that it contains an exploitable weakness. Nor does the absence of a known vulnerability establish that the system will remain safe indefinitely.

Some attacks require direct technical exploitation. Others work through stolen credentials, insecure services, compromised dependencies, or human deception.

The feasibility of an attack depends on the system, the attacker, the available paths, and the defenses in place.

What matters is recognizing that security is a condition we maintain, not a permanent property we acquire.

A device does not become trustworthy forever because it received an update yesterday. An account is not immune to compromise because its password is complex. A company is not secure simply because it purchased expensive security software.

Every connected system exists within a changing environment of people, software, services, and decisions.

The honest question is therefore not whether we can prove that everything will eventually be hacked.

We cannot.

The better question is whether we are treating the systems we depend on as carefully as their risks demand.

Because the most dangerous security assumption may not be that an attacker is trying to get in.

It may be the belief that there is no possible way in.

Sources and Further Reading

This article draws on publicly available technical guidance and documented security incidents:

1. Federal Trade Commission — Equifax Data Breach Settlement and Security Failures
https://www.ftc.gov/news-events/news/press-releases/2019/07/equifax-pay-575-million-part-settlement-ftc-cfpb-states-related-2017-data-breach

2. NIST — Zero Trust Architecture (SP 800-207)
https://www.nist.gov/publications/zero-trust-architecture

3. NIST — Cybersecurity Framework 2.0
https://www.nist.gov/publications/nist-cybersecurity-framework-csf-20

4. CISA and NSA — Top Ten Cybersecurity Misconfigurations
https://www.cisa.gov/news-events/cybersecurity-advisories/aa23-278a

5. CISA — The Case for Memory Safe Roadmaps
https://www.cisa.gov/resources-tools/resources/case-memory-safe-roadmaps