The Hidden Attack Surface: Why Physical Security Needs Help From The IT World

From gunshot detection to door sensors, black box testing is no longer optional as life-safety devices become high-stakes nodes on the IT network.

• By Rich Onofrio
• May 15, 2026

Physical security and cybersecurity used to live in different lanes. Cameras, access control systems, alarm sensors, and life-safety devices were installed and managed as siloed, standalone systems.

Today, every physical security solution is networked, cloud-connected or integrated as part of a larger enterprise IT network. This convergence and connectivity bring huge operational benefits, but it also expands the attack surface. Any device installed to protect a facility can unintentionally become a doorway into the network if it is not designed, deployed and tested with cybersecurity in mind.

Saving Lives in Active Shooter Scenarios

Consider gunshot detection systems, deployed across schools, hospitals and corporate campuses to save lives in active shooter scenarios. These systems require split-second accuracy and immediate notification to law enforcement.

A compromised sensor could mean false alerts that desensitize responders, suppressed alerts during an actual emergency, or manipulation of location data that sends help to the wrong place. When the device's core purpose is life safety, cybersecurity is not just about data protection, it is about mission integrity.

One of the most practical ways for an integrator, dealer or end user to validate that a security device can hold up against real-world threats is “black box testing.” As connected physical security continues to proliferate, black box testing, or penetration (pen) testing is quickly becoming a minimum requirement, not a differentiator reserved for only the most mature manufacturers.

What Black Box Testing Is and What it is Not

Black box testing is a form of penetration testing that simulates the perspective of an external attacker. The “black box” label means the tester starts with no insider knowledge, such as no source code, no developer notes, no architecture diagrams, and no special credentials beyond what a typical adversary could obtain.

Testers probe hardware and software the same way an attacker would by looking for exposed ports, weak authentication, misconfigured services, improper encryption, and firmware vulnerabilities.

This approach is different from other penetration-testing models. For example, white box testing gives a tester full knowledge of the system, including source code and design documentation. The goal here is to find flaws from the inside out.

On the other hand, gray box testing provides partial knowledge, such as limited credentials or high-level architecture, and mirrors a scenario where an attacker has some foothold. Finally, black box testing or penetration testing, by contrast, is the most realistic model for assessing what could happen if a threat actor encounters a product “in the wild.”

Within the security industry, penetration testing is an accepted testing approach. It is valuable because a substantial portion of risk comes from what attackers can do without any help. The tester’s job is not to confirm what engineers already suspect. Instead, the tester's job is to uncover what has not been anticipated.

Annual Penetration Testing is a Baseline Requirement

As physical and cyber security converge, the stakes of failure rise. A camera, intercom, or sensor is no longer just a peripheral but a node that resides on an enterprise network. If compromised, it can be used to exfiltrate sensitive data, disrupt operations, or serve as a pivot point into other systems. Even a “security-only” network typically connects to broader IT infrastructure, meaning that any connected physical security device must be treated like any other networked endpoint.

Because of this, enterprise and government customers now require proof of ongoing penetration testing before allowing devices onto their networks. These organizations often conduct their own validation as part of procurement, but they also expect vendors to meet strict thresholds for encryption, authentication, and secure protocol use. Annual third-party testing is increasingly viewed as the clearest evidence that a solution provider takes cybersecurity seriously.

There is also a lifecycle reality that needs to be taken into consideration. For example, a product that was secure at launch may not be secure a year later. This is because as threat actors evolve, new exploits appear and dependencies change.

Firmware and software updates introduce improvements but simultaneously introduce risk. This is particularly critical for life-safety systems like gunshot detection, where a firmware update might improve acoustic algorithms but inadvertently create a new attack vector.

A gunshot detection system that was secure at deployment may integrate new AI models, cloud connectivity features, or third-party integrations over its lifecycle, each requiring fresh validation. Annual penetration testing helps close potential gaps by ensuring security posture keeps pace with the threat landscape.

For manufacturers and service providers, black box testing often seems like a burden, especially in early growth stages. But over time it becomes a core and natural part of product maturity.

The cost of engaging an independent testing firm is far less than the cost of a breach, a recall or reputational damage. More importantly, ongoing testing provides a consistent, objective view of risk that internal teams may miss due to familiarity with the product.

What Should Be Tested and What to Ask

A meaningful cybersecurity penetration testing program looks beyond a single component by evaluating everything in the path, because attackers do not typically respect product boundaries. As a best practice, hardware devices, firmware, software and cloud applications should be evaluated. Also, it is important to include the full communication chain between endpoints, servers and user interfaces.

In many programs, vendors provide their latest hardware, and software builds to an independent third party. The testing window typically spans several weeks, allowing testers time to assess multiple attack vectors and attempt real exploitation rather than surface scanning.

At the end of the engagement, the vendor receives a detailed report identifying vulnerabilities, ranking them by severity, and describing how they were found.

What happens next is just as important as the test itself. The product team reviews findings, determines true risk levels, prioritizes remediation and implements fixes. Mature organizations combine third-party penetration testing with ongoing in-house testing, so security checks happen continuously, not just once a year. This annual engagement then serves as an external validation checkpoint and a way to catch blind spots.

As far as which devices should be on the list, the simple answer is any connected product that touches a network or transmits sensitive data.

This includes obvious categories such as access control, video surveillance and alarm systems, but should also incorporate life-safety technologies like gunshot detection sensors, panic buttons, and emergency notification systems.

Gunshot detection deserves particular attention because these systems sit at the intersection of multiple attack surfaces – sensors in the field, edge processing hardware, analytics, mobile applications for first responders, and integrations with access control or video management systems. Each component represents a potential vulnerability.

If exploited, the consequences extend beyond data – false positives can trigger lockdowns and trauma, false negatives can delay life-saving response and manipulated location data could send help to the wrong building entirely. In a converged environment, cyber resilience for life-safety devices must be viewed as inseparable from their physical protection mission.

For integrators, dealers and end users, the lack of universal “labels” or consumer-facing standards means the best defense is asking the right questions. For example, end users want to know if a product has completed annual cyber testing and might then perform their own testing to confirm results.

A practical checklist should include questions like:

• “Do you perform annual penetration testing of your hardware and software components?
• “Is the testing done by an independent third party? What credentials do they hold?”
• “How do you validate encryption, authentication, and security protocol use?”
• “How do you evaluate failover scenarios and ensure the system defaults to safe operation if compromised?”

These questions do not require deep technical expertise, but rather they provide a valuable and insightful way to confirm that cybersecurity is not an afterthought and that the vendor views cybersecurity as an ongoing responsibility.

Penetration testing is no longer “nice to have” for physical security providers operating in a connected world. It is a realistic, attacker-minded method for uncovering vulnerabilities before adversaries do, while at the same time helping to ensure that devices meant to protect people and places do not become liabilities.

As convergence accelerates, annual penetration testing, paired with continuous internal validation, is one of the clearest indicators that a security solution is ready for enterprise-grade deployment and long-term trust. For life-safety technologies like gunshot detection, this is not just the best practice. It is the baseline for systems designed to save lives.

This article originally appeared in the May/June 2026 issue of Security Today.