Cybersecurity teams often focus on software and digital perimeters. However, physical components deserve similar attention. A defective semiconductor or circuit board can also cause failures, weaken security functions or create conditions that attackers can exploit.
Component defects can therefore become cybersecurity liabilities after hardware enters the market. Security teams need to consider how manufacturing quality and component provenance can affect the systems they protect.
Small imperfections introduced during fabrication, finishing or assembly can affect how critical hardware performs in the field. One study found that the FDA issued 18 safety communications related to cybersecurity breaches in medical devices between 2013 and 2025.
These issues span industries beyond healthcare. The consequences depend on the component, its role and the conditions surrounding its use.
Material Degradation and the Risk of Black Pad Syndrome
Semiconductors and circuit boards used in security systems depend on controlled materials and surface finishes. Defects can weaken solder joints and produce intermittent connections that may cause component failure.
Black pad syndrome provides one example. With ENIG surface finishing, corrosion of the nickel layer can leave a brittle, phosphorus-rich layer beneath the gold. The weakened surface can interfere with solderability and contribute to field failures. When the affected component supports a cryptographic module or security controller, abnormal electrical behavior can create security defects.
Additionally, counterfeit components may contain incorrect specifications, recycled materials, altered markings or unknown manufacturing histories. Deliberately modified hardware could introduce additional risks. ERAI’s 2025 annual report found that 68.84 percent of parts reported to the organization were classified as Suspect Counterfeit. It also found that 24 percent of these components passed electrical testing, showing the limits of basic checks.
Real-World Threats From Defective Components
A physical defect can reduce a component’s tolerance to stress, which gives attackers an opportunity to target it. Fault injection deliberately manipulates hardware conditions to produce an unexpected result. Techniques can include voltage or clock manipulation and temperature changes.
A degraded component may respond unpredictably under these conditions. If the attack occurs during a cryptographic operation or security check, the resulting error could interfere with authentication or expose information. Hardware operating close to its failure threshold may crash or reset when exposed to additional electrical, thermal or computational stress. An attacker who can repeatedly trigger those conditions may turn an existing reliability weakness into a denial-of-service problem.
Mitigating Defective Component Risks
Hardware security requires controls across procurement, testing and system design. Incorporating component integrity into the security life cycle can help reduce exposure. Companies should prioritize suppliers that document manufacturing controls and component provenance. Controlled plating thicknesses and fabrication processes can reduce the risk of material degradation in semiconductor and PCB components.
Visual inspection, electrical testing and supplier documentation can provide additional checks before components reach production. Redundancy built into critical systems also helps ensure one component failure does not turn off an entire security function. Independent controllers and fail-safe mechanisms can help maintain operations when hardware fails.
Designers should also consider shared dependencies. For example, two redundant components that rely on the same power source or controller can still share a common failure point.
Companies should verify the identity and origin of security-critical components before deployment. Serialization, chain-of-custody records, supplier documentation and physical inspection can help confirm that parts match their expected specifications.
Hardware defects can undermine cybersecurity through failures, unpredictable behavior and opportunities for manipulation. Security teams should include component integrity in procurement reviews and testing, especially for systems that depend on trusted products.
Lou is the Senior Editor at Revolutionized, specializing in writing about Technology, Computing, and Robotics.
