Are Smart Locks Hackable? What Homeowners Should Know

A smart lock can let you check the front door from work, give a contractor a temporary code, or stop worrying whether a teenager remembered a key. Those are useful benefits, but homeowners are right to ask: are smart locks hackable? The honest answer is yes, they can be attacked. So can conventional locks, keys, garage remotes, and alarm systems. What matters is how a lock is built, how it is installed, and whether the owner uses its security features correctly.

For most homes and small businesses, the more common problem is not a stranger performing a sophisticated remote hack. It is a weak door, an exposed backup key, a shared code that was never deleted, a reused account password, or a lock installed without proper reinforcement. A smart lock should be treated as one part of a complete security plan, not as a replacement for sound physical security.

Are Smart Locks Hackable? The Real Risks

Smart locks use a combination of mechanical hardware and electronic controls. Depending on the model, they may communicate through Bluetooth, Wi-Fi, Z-Wave, Zigbee, a keypad, a phone app, or a central access control system. Each feature adds convenience, but it can also add another point that needs to be secured.

Remote hacking is possible when a lock, app, home network, or connected account has a weakness. Older devices may have outdated software. A poorly protected Wi-Fi network can expose connected devices. Stolen passwords, phishing messages, and unsecured phones can also give someone access without them ever touching the lock itself.

That said, successful attacks are rarely as simple as a person standing on the sidewalk and pressing a button. Reputable current-generation locks use encrypted communication and require account authentication. The risk rises when owners choose bargain hardware from unknown manufacturers, skip firmware updates, leave default settings in place, or use the same password for a lock account, email, and social media.

Physical attacks remain a concern as well. A smart deadbolt can still be vulnerable if the door frame is weak, the strike plate has short screws, the lock cylinder is low quality, or the door has glass close enough for someone to reach the interior thumbturn. Electronic convenience does not change the need for a properly fitted deadbolt and reinforced frame.

The Most Common Ways Smart Lock Security Fails

Most security failures come down to access management rather than advanced hacking. A former tenant may still have an active code. A cleaner, employee, dog walker, or contractor may know a PIN that was intended to be temporary. An old phone may remain signed in to the lock app after being sold, lost, or passed to a family member.

Weak login credentials create another avoidable risk. If someone can access the email address tied to a smart lock account, they may be able to reset the password and take control of the account. A unique password and multi-factor authentication are often more valuable than an extra app feature.

Installation is another major factor. A lock that does not fully align with its strike plate may fail to latch properly. A deadbolt mounted on a damaged door, loose frame, or hollow-core entry door does not offer the protection people expect. On commercial properties, the issue can become more complicated when staff access, emergency egress, door closers, alarm systems, and fire code requirements all need to work together.

There is also the risk of power or connectivity loss. Most battery-powered smart locks provide low-battery alerts and include a mechanical keyway or external emergency power option. Still, those features vary by model. Before purchasing, homeowners should understand exactly how they will enter if batteries die, their phone is unavailable, or the internet goes down.

How to Choose a Safer Smart Lock

Start with the door, not the app. Look for a quality deadbolt from an established manufacturer and confirm that it is appropriate for the type of door and level of use. For a primary exterior door, a lock with a strong mechanical component, a protected keyway where applicable, and reliable motor operation is usually a better choice than the lowest-priced connected device.

Choose a model that receives ongoing software support. Manufacturers should publish firmware updates and make it easy for owners to install them. A lock that is no longer supported can become harder to secure over time, even if its hardware still works.

Look for practical account controls. The ability to create individual user codes, assign schedules, review access activity, and remove users immediately is valuable for busy households and rental properties. For a business, individual credentials are far safer than one shared door code written on a staff-room notice board.

If the lock connects through Wi-Fi, secure the network with a strong router password and current encryption. Keep smart home devices on a separate guest or device network when possible. Bluetooth-only locks reduce dependence on the home network, but they have their own limitations, including shorter operating range and fewer remote-management options. There is no single best option for every property.

For higher-risk locations, consider whether a residential smart lock is the right tool at all. A medical office, retail store, warehouse, multi-unit building, or site with valuable inventory may need commercial-grade access control, properly managed credentials, door hardware designed for frequent use, and an emergency plan for power failure. Convenience features should never interfere with safe exit or code-compliant door operation.

Simple Steps That Make Smart Locks Harder to Defeat

Once a smart lock is installed, a few regular habits make a meaningful difference. Use a unique, long password for the lock account and turn on multi-factor authentication if the manufacturer offers it. Do not share the main account login with family members or employees. Give each person their own code or invited app access so it can be removed without affecting everyone else.

Review user access after changes in the household or workplace. Delete codes for former employees, tenants, contractors, and anyone who no longer needs entry. Temporary codes should have an end date whenever possible. This is especially useful for short-term visitors, service calls, and rental turnovers.

Keep the lock app, lock firmware, phone operating system, and home router updated. Updates can correct known security issues, improve reliability, and fix problems before they become an inconvenience at the door. Enable alerts for low batteries and replace batteries on schedule rather than waiting for a warning at an inconvenient time.

Do not overlook the mechanical side of the door. Use a reinforced strike plate secured with long screws that reach the framing. Make sure the deadbolt extends fully and does not bind. Repair loose hinges, cracked frames, damaged weather stripping, and doors that shift with seasonal temperature changes. A well-installed standard lock on a solid door is often more secure than an advanced smart lock installed poorly.

What to Do If You Think Your Smart Lock Has Been Compromised

If the lock behaves unexpectedly, do not assume it has been hacked immediately. Battery problems, Wi-Fi outages, misalignment, and app glitches are common causes. Check the activity log, review authorized users, and confirm whether anyone in the household changed settings.

Then change the account password, sign out unknown devices, remove unrecognized users, and update the lock firmware. If a phone with access was lost or stolen, revoke its access right away. For locks with physical keys, consider rekeying or replacing the cylinder if keys may have been copied, lost, or left with a former occupant.

If the door will not lock properly, there are signs of forced entry, or you are unsure whether the hardware is secure, have a qualified locksmith inspect the entire opening. The lock, door, frame, strike, hinges, and access settings need to be evaluated together. Durham Regional Locksmiths can help property owners assess whether a smart lock is installed correctly, repair the mechanical hardware behind it, or recommend a better fit for the property.

A smart lock is not automatically safer or less safe than a traditional lock. It is safer when it comes from a reputable manufacturer, is properly installed, receives updates, and is managed with the same care you would give any key to your home or business. The best next step is to look at the door you have, the people who need access, and the risks you actually need to manage - then choose security that works reliably when you need it most.