By James Walker Ā |Ā Home Automation & Security Editor
ā” Quick Answer:
Smart locks can be broken into, but not always in the ways people expect. Physical attacks on the door frame remain the most common entry method. Digital vulnerabilities exist but are far less common in practice. The quality of the lock, door frame, and your account security all matter more than the “smart” label alone.
Smart locks have become one of the most popular upgrades in home automation ā keyless entry, remote access, and access logs all sound compelling. But a common and very reasonable question follows: can smart locks be broken into? And if so, how?
The honest answer is that every lock has vulnerabilities. The goal is not to find a lock that is impossible to defeat ā no such lock exists ā but to understand where the real risks are so you can make smarter choices about your front door, your network, and your overall home security setup.
Physical Attack Risks
Digital Vulnerabilities
Lock Buying Guidance
Home Entry Best Practices
ā ļø Educational Disclaimer
This article is for general educational and purchasing guidance only. It does not guarantee security outcomes or replace advice from a licensed installer, electrician, or security professional. Some installations may require licensed electrical work or local permit compliance. Always check your local building codes and consult a qualified professional when needed.
The Real Question: What Does “Breaking In” Actually Mean?
When most people ask whether smart locks can be broken into, they picture someone hacking a phone app or intercepting a wireless signal. In reality, the most common way any locked door is defeated ā smart or traditional ā is through brute physical force applied to the door frame, not the lock itself.
A door kicked in at the frame, a deadbolt cylinder drilled out, or a hinge attacked from the outside are all physical vulnerabilities that apply equally to traditional and smart locks. Adding connectivity to a lock changes the digital attack surface but does not automatically weaken the physical one ā or strengthen it either.
Understanding the full picture means separating physical vulnerabilities from digital ones, because the defenses for each are completely different. Smart locks can be broken into through both categories, but the likelihood and method vary significantly depending on the hardware, protocol, and how well the homeowner manages the digital side.
šŖ How Smart Locks Can Be Compromised ā Attack Category Flow
This flow represents practical attack categories for awareness. Actual risk depends on your specific lock, door, and security habits.
Physical Vulnerabilities: The Most Common Way Smart Locks Get Bypassed
The inconvenient truth for any lock discussion is that the door frame is usually the weakest point ā not the lock. Most residential door frames are attached to the rough framing with short screws that reach only into the door casing, not the structural studs. A solid kick at the right spot can defeat even a high-quality deadbolt if the frame gives way first.
Smart locks sit on the same doors with the same frames. They inherit all the physical vulnerabilities of the installation, regardless of how advanced their wireless technology is. This means the answer to whether smart locks can be broken into physically is: yes, on most standard residential doors, if the frame has not been reinforced.
Deadbolt Grade and Cylinder Quality
Not all smart lock hardware is built equally at the mechanical level. ANSI/BHMA grades (Grade 1, Grade 2, Grade 3) reflect the tested strength of a lock’s resistance to physical attack. Grade 1 is the strongest and is recommended for exterior residential doors. Some budget smart locks use lower-grade cylinders that are more susceptible to picking, bumping, or drilling.
When evaluating a smart lock, look at the mechanical grade, not just the app features. A smart lock with a Grade 1 deadbolt and a hardened anti-drill cylinder on a reinforced door frame provides meaningfully better physical resistance than a Grade 3 lock on an unreinforced frame.
The Door Frame and Strike Plate Problem
Most standard residential strike plates use screws that are one inch long or shorter. Replacing the strike plate with a heavy-duty model using three-inch screws that reach into the door stud significantly increases resistance to forced entry. This single change ā which costs very little ā often does more to protect a door than upgrading the lock itself.
š Note
The physical security of your door installation matters as much as the smart lock itself. A Grade 1 smart deadbolt on a door with a reinforced strike plate and solid core door will resist physical attack far better than a Grade 3 smart lock on a hollow-core door with a standard strike plate ā regardless of the lock’s digital features.
Physical Attack Methods That Target Smart Lock Hardware Specifically
Some physical attack methods are more specifically relevant to smart locks because of their design differences from traditional locks. Keypad-equipped smart locks that also have a physical key slot still maintain a conventional cylinder ā which can be picked or bumped if the cylinder quality is low. Locks that use a motor to retract the bolt also have an electronic component that could theoretically be disrupted, though this requires close physical access and is far less common than frame attacks.
Physical Vulnerability Comparison: Smart Lock vs Traditional Deadbolt
Digital Vulnerabilities: How the “Smart” Part Can Be Exploited
The connectivity that makes smart locks convenient also introduces an attack surface that traditional locks do not have. But it is important to put this in realistic context. Digital attacks on residential smart locks are technically complex and require specific knowledge, proximity in some cases, or access to stolen credentials. They are not the primary risk for most homeowners.
That said, understanding where the digital vulnerabilities are helps you close the gaps that do matter. Smart locks can be broken into digitally through a small number of practical pathways that are worth knowing about.
Compromised App Account Credentials
This is the most practically significant digital vulnerability for most smart lock owners. If your lock app account uses a weak or reused password ā or if the same email and password combination was exposed in a data breach on another service ā someone could log into your account remotely and unlock your door without ever touching it physically.
Two-factor authentication (2FA) is the single most effective countermeasure. With 2FA enabled, stolen credentials alone are not enough to access the account. Most major smart lock brands support 2FA through their apps, but many users do not enable it during setup.
Unpatched Firmware Vulnerabilities
Security researchers have periodically disclosed vulnerabilities in specific smart lock models ā particularly issues involving Bluetooth implementation, authentication logic, or cloud API weaknesses. Manufacturers typically release firmware updates to patch these issues. Locks that are never updated remain exposed to vulnerabilities that have been publicly documented and patched.
Keeping firmware current is one of the simplest and most effective digital hygiene steps available to smart lock owners. Most modern lock apps notify you when an update is available.
Stale Guest Codes and Access Permissions
One of the most overlooked digital vulnerabilities is entirely non-technical: access credentials that should have been revoked but were not. A contractor who was given a temporary PIN, a former tenant on a rental property, or an app user added during a visit who was never removed all represent real access risks. Smart locks log access events, but they do not automatically clean up stale permissions.
ā ļø Warning
If you have recently moved into a new home with an existing smart lock, treat all previous credentials as compromised. Factory reset the lock immediately, re-register it under your own account, and set up new PINs and access permissions from scratch. Do not assume the previous owner removed their access.
Common Smart Lock Security Problems vs Likely Cause
How to Evaluate Whether a Smart Lock Has Good Physical Security
Choosing a smart lock that holds up physically requires looking past the app and connectivity specs. The mechanical quality of the lock hardware matters in ways that are easy to overlook when shopping based on smart home compatibility alone.
š Smart Lock Physical Security Evaluation ā Decision Path
Step 1: Check the ANSI/BHMA Grade
Look for Grade 1 for exterior residential doors. Grade 2 may be acceptable for some interior applications. Grade 3 is generally not recommended for primary entry points. The grade should appear in the product specification or packaging.
Step 2: Assess the Cylinder or Keyway Design
Does the lock have a physical key slot? If so, what is the cylinder quality? Some smart locks intentionally eliminate the keyway to remove the picking attack surface. Others include a keyed cylinder as a backup entry method ā in that case, the cylinder quality matters.
Step 3: Evaluate the Bolt Throw and Material
A one-inch hardened steel bolt throw is standard for quality deadbolts. Shorter throws or bolts made of softer materials offer less resistance to kick-in attacks. Check the product specification for bolt length and material where available.
Step 4: Check Your Door Frame Independently
Even the strongest smart lock cannot compensate for a weak door frame. Inspect your current strike plate and screw length. A door security kit with longer screws and a reinforced strike plate adds meaningful resistance regardless of which smart lock you choose.
This decision path is a practical evaluation guide, not a professional security audit. For formal assessments, consult a licensed locksmith or security professional.
Strengthening Your Smart Lock Setup: A Step-by-Step Hardening Guide
Reducing the risk of your smart lock being compromised ā physically or digitally ā involves layering several practical measures. Here is a structured approach that covers both attack categories.
š” Tip
In my experience setting up smart locks across multiple door types, the access log feature is consistently underused. Setting a recurring monthly reminder to review it takes thirty seconds to add to a calendar and can make a real difference in catching unusual access events early ā before they escalate into something more serious.
Safe Smart Lock Setup vs Practices That Create Unnecessary Risk
Many of the ways smart locks can be broken into come down to how they are set up and managed over time rather than an inherent flaw in the technology itself. Here is a side-by-side look at the practices that hold up versus the ones that create gaps.
Smart Locks and Different Home Types: Which Setup Fits Best?
The vulnerability profile for smart locks can be broken into varies depending on the home type and living situation. Renters, homeowners, and landlords each face slightly different considerations when it comes to managing access and physical security.
š Smart Lock Security Fit by Home Type ā Practical Guide
Bar widths represent relative fit suitability as a practical guide only, not scientific data.
Owner-Occupied Single Family Home ā Full control over hardware and network
Rental Property / Landlord ā Access management is the primary concern
Apartment Renter ā Installation flexibility limited by lease agreement
Short-Term Rental Host ā Remote access management is the main use case
Condo / HOA Community ā May require board approval for exterior hardware changes
Consult your lease, HOA rules, or local building authority before making permanent changes to door hardware.
What Experienced Smart Home Users Know That Beginners Often Miss
Beyond the basics of installation and app setup, there are several security habits that separate a well-maintained smart lock from one that could easily be broken into through oversight rather than sophisticated attack.
š Battery Fail Behavior
Know whether your lock defaults to locked or unlocked when the battery dies. Some models unlock on power failure, which is a significant security gap. Check the manufacturer specification before purchasing, and set low-battery alerts in the app.
š Auto-Lock Configuration
Most smart locks support auto-lock after a set time interval. Many users never enable it. A door left unlocked because someone forgot to manually engage the deadbolt is one of the most common real-world access gaps ā and entirely preventable.
š Geofence Auto-Unlock Risks
Geofence-based auto-unlock is a convenience feature that unlocks the door as your phone approaches. It also means anyone carrying your phone ā or spoofing the location ā could trigger an unlock. Experienced users evaluate whether this feature’s convenience outweighs the risk for their specific situation.
š± Keypad PIN Wear Patterns
On frequently used keypads, the buttons used in a PIN code may show visible wear over time, potentially narrowing the combinations an observer could guess. Rotating your PIN every few months and using longer codes (six to eight digits) reduces this risk.
Red Flags That Your Smart Lock Security Needs Attention
Before choosing a smart lock or evaluating your current one, it helps to have a clear checklist of the signals that indicate a security gap. These are the red flags that suggest your setup may be more vulnerable than it needs to be.
š© Smart Lock Security Red-Flag Dashboard
š“ Firmware never updated since installation
Known vulnerabilities may remain unpatched. Check your app for pending updates immediately.
š“ No two-factor authentication on app account
Account compromise is the most practical digital risk. Enable 2FA in your account settings today.
š“ Guest codes from months ago still active
Access codes that should have been revoked represent a real, ongoing access risk. Audit now.
š¢ Auto-lock enabled with a 30ā60 second delay
Prevents the door being left unlocked accidentally. One of the most reliable habit-replacing features a smart lock offers.
š“ Standard strike plate with short screws
The physical frame is the most common real-world bypass point. Upgrade the strike plate regardless of which lock you use.
š¢ Access log reviewed in the past 30 days
Regular log review is the simplest way to detect unexpected access events before they become a larger problem.
Red flags indicate areas needing immediate attention. Green checks indicate security hygiene already in place.
Recommended Smart Locks With Stronger Physical and Digital Security
If you are evaluating upgrades specifically because you are concerned about how vulnerable your current lock is, the following options are widely available and use protocols that address both physical and digital security considerations. No lock is unbreakable, and these do not replace proper door frame reinforcement or good account hygiene.
Affiliate Disclosure
This article may contain affiliate links. If you buy through these links, we may earn a small commission at no extra cost to you. We only mention products that are relevant to the topic and do not replace advice from a qualified installer or professional.
Schlage B60N Single Cylinder Deadbolt + Smart Add-On (Encode Series)
Schlage’s Encode series is built on a Grade 1 deadbolt foundation with built-in alarm technology and a hardened cylinder. It may support a more robust physical security baseline than many purely app-focused smart locks, making it worth considering for homeowners who want both mechanical and connected access features.
August Wi-Fi Smart Lock (4th Generation)
August installs over your existing deadbolt cylinder, which means your current physical deadbolt grade is preserved. It connects via Bluetooth LE and built-in Wi-Fi, uses encrypted pairing, and includes detailed access logging. It may help homeowners who want smart access features without replacing their existing keyed cylinder.
Smart Lock Selection: DIY vs When to Hire a Professional
Priority Meter: Where to Focus Your Smart Lock Security Efforts
Not every security measure deserves equal attention and budget. The following priority guide reflects where practical improvements have the most meaningful impact on reducing the likelihood that a smart lock can be broken into.
š Smart Lock Security Priority Meter ā Practical Guide
Bar widths represent relative impact on typical residential security. Not scientific data ā reflects practical security guidance.
Door frame reinforcement + heavy-duty strike plate
Two-factor authentication + strong unique password
ANSI Grade 1 deadbolt with hardened cylinder
Regular firmware updates
Guest access audit and PIN rotation
IoT network segmentation (VLAN / guest network)
Start at the top and work down. The highest-impact items require the least technical complexity and deliver the most consistent real-world benefit.
Where to Find Reliable Smart Lock and Home Security Guidance
Federal agencies publish practical, plain-language guidance on connected device security that is relevant to smart lock owners. The Cybersecurity and Infrastructure Security Agency (CISA) offers guidance on securing smart home devices, including network hygiene and firmware update practices that apply directly to smart locks.
The Federal Trade Commission (FTC) Internet of Things guidance covers consumer rights and best practices for evaluating the security claims made by connected device manufacturers, including what to look for and what claims to be skeptical of.
š”ļø Safety Note
Some smart lock installations involve drilling new bore holes, modifying the door frame, or routing wiring for powered access control systems. If your installation goes beyond a standard deadbolt replacement ā especially if it requires any electrical work ā consult the manufacturer’s installation guide and consider hiring a licensed locksmith or qualified installer. Always check your lease agreement or HOA rules before modifying exterior door hardware.
š§ When to Contact a Professional
- Your door requires new bore holes or significant frame modification for the lock to fit
- You are installing a powered or wired access control system that connects to home electrical
- You suspect your current lock has been tampered with or physically damaged
- You are moving into a home with an existing smart lock and want the access fully reset and re-registered under your ownership
- You manage a rental or multifamily property and want a formal security assessment of your access control system
- Your building is subject to HOA rules, local permit requirements, or lease restrictions on hardware modifications
Frequently Asked Questions
Can smart locks be broken into more easily than traditional deadbolts?
Not necessarily more easily ā but differently. Smart locks inherit all the physical vulnerabilities of the door installation, such as frame weakness, just like traditional deadbolts. They also add a digital attack surface through the app account and wireless protocol that traditional locks do not have. With proper setup, firmware updates, and account security, a quality smart lock is not meaningfully less secure than a comparable traditional deadbolt.
What is the most common way a smart lock gets compromised in real life?
The most common real-world compromises are not sophisticated hacking attacks. They are: forced entry on a weak door frame, stale guest PIN codes that were never revoked, and compromised app account credentials from reused passwords. These are all preventable with basic security habits rather than expensive hardware upgrades.
Do smart locks need to be updated like software apps?
Yes. Smart lock manufacturers release firmware updates that may include security patches for discovered vulnerabilities. A lock running its original factory firmware from years ago may have known, publicly documented issues that have since been fixed. Most lock apps notify you when firmware updates are available. Applying them promptly is one of the simplest security maintenance steps available.
Is a smart lock safe for a rental property or Airbnb?
Smart locks are widely used in rental and short-term rental properties because of their remote access and time-limited PIN features. The key security practice is rotating guest PIN codes after every stay and auditing active access permissions regularly. Smart locks do not automatically remove old guest codes ā that requires active management by the property owner or manager.
What happens to a smart lock if the power or Wi-Fi goes out?
Most smart locks run on batteries and are not affected by a power outage on their core locking function. Wi-Fi or hub outages typically affect only the remote app control and cloud access log features. The keypad PIN and, if equipped, physical key backup will generally still work during connectivity loss. Check your specific lock’s documentation for its exact behavior during a network outage.
Should I choose a smart lock with or without a physical key backup?
This is a genuine trade-off. A physical key backup provides an emergency entry method if batteries die or the app is unavailable ā but the key slot also introduces a picking attack surface. Locks without a keyway eliminate that specific physical attack vector but require reliable battery management and a backup PIN strategy. For most homeowners, a quality cylinder with a physical key backup and solid battery monitoring offers a reasonable balance.
Can a landlord install a smart lock without tenant permission?
Landlord-tenant rules around lock changes vary by state and local law. In many jurisdictions, landlords are required to provide tenants with copies of any keys or access codes if they change the entry hardware. Some jurisdictions require advance notice before changing a lock. Tenants have the right to know how to enter their rental unit. Both landlords and tenants should review their local laws and lease terms before changing or accepting a new smart lock installation.
Final Thoughts: Layered Security Is the Real Answer
Smart locks can be broken into ā physically through the door frame or lock hardware, and digitally through account compromise or unpatched firmware. But the same is true in different forms for every type of lock. The goal is not to find an impenetrable lock, but to close the most practical gaps with the most effective measures.
A reinforced strike plate, a Grade 1 deadbolt, two-factor authentication, regular firmware updates, and active access log reviews together create a meaningful layer of protection that the vast majority of opportunistic threats will not attempt to overcome.
For any installation that involves door modifications, wiring, or a situation where you are unsure about your local regulations, consult a licensed locksmith or qualified installer. Review your lease or HOA rules before purchasing, and always check local building codes before making permanent changes to door hardware.