Glossary
Plain-English definitions for the acronyms and standards you'll see across every topic.
Four artifacts, one inventory family
Machine-readable list of every software component in the device.
Think of SBOM as the parent inventory. VEX and VDR explain risk. CBOM zooms in on crypto.
Standards
SBOM
Software Bill of MaterialsA formal, machine-readable inventory of every software component (proprietary, open-source, third-party) that ships in a device. Required by FDA for cyber devices under Section 524B.
MDS2
Manufacturer Disclosure Statement for Medical Device SecurityAn IHE/HIMSS-standardized form (MDS2) that manufacturers provide to healthcare delivery organizations describing the security characteristics of a device.
TIR57
AAMI TIR57AAMI Technical Information Report describing security risk management principles for medical devices, the foundation referenced by FDA guidance.
SW96
ANSI/AAMI SW96Standard for medical device security risk management activities and documentation, complementary to ISO 14971 safety risk management.
IEC 81001-5-1
International standard specifying a secure development lifecycle (SDL/SPDF) for health software and health IT systems.
SOUP
Software of Unknown ProvenanceIEC 62304 term for software not developed for a specific medical device (e.g., OS, libraries, OSS). Must be identified, risk-assessed, and tracked for vulnerabilities throughout the product lifecycle.
IEC 62304
International standard for medical device software lifecycle processes, covering software safety classification (A/B/C), development, maintenance, risk, and configuration management.
ISO 14971
International standard for the application of risk management to medical devices. Security risk management (per AAMI SW96/TIR57) complements but does not replace ISO 14971 safety risk.
ISO 27001
International standard for information security management systems (ISMS). Often referenced for the manufacturer's enterprise security posture, distinct from product security.
UL 2900
UL standard series for testable cybersecurity criteria of network-connectable products and systems, including UL 2900-2-1 for healthcare and wellness devices.
NIST CSF
NIST Cybersecurity FrameworkA voluntary framework (Identify, Protect, Detect, Respond, Recover, Govern) widely referenced by FDA guidance and used to structure a manufacturer's overall security program.
MDR
EU Medical Device RegulationRegulation (EU) 2017/745 governing medical devices in the European Union. Includes cybersecurity expectations clarified by MDCG 2019-16 guidance.
Notified Body
An EU-designated conformity assessment organization that audits manufacturers and reviews technical documentation for CE marking under MDR/IVDR.
Process
SPDF
Secure Product Development FrameworkA lifecycle framework (recognized by FDA) for embedding security into design, development, manufacturing, and postmarket. AAMI TIR57 and IEC 81001-5-1 are common reference standards.
CVD
Coordinated Vulnerability DisclosureA documented policy and process for receiving, triaging, and disclosing security vulnerabilities responsibly. Required for FDA cyber devices.
PSIRT
Product Security Incident Response TeamThe internal team responsible for receiving vulnerability reports, coordinating fixes, and communicating with researchers, customers, and regulators. Required in practice to meet FDA CVD expectations.
Pen Test
Penetration TestGoal-oriented security testing that simulates an attacker against a device, its interfaces, and its supporting infrastructure. FDA expects penetration testing evidence for cyber devices.
HDO
Healthcare Delivery OrganizationA hospital, clinic, or health system that deploys and operates medical devices. The primary audience for MDS2 forms and customer-facing security documentation.
FDA
524B
Section 524B of the FD&C ActThe FDA cybersecurity authority for cyber devices. Requires a cybersecurity management plan, SBOM, vulnerability monitoring, and reasonable assurance of security in premarket submissions.
RTA
Refuse to AcceptAn early FDA review checkpoint. If a 510(k) submission fails the RTA cybersecurity checklist, it is returned without substantive review, restarting the clock.
eSTAR
electronic Submission Template And ResourceFDA's interactive PDF template for 510(k) and De Novo submissions. Cybersecurity sections are guided and required.
TPLC
Total Product Life CycleFDA's framing for managing risk and quality from concept through end-of-support, including postmarket surveillance and security updates.
PMA
Premarket ApprovalFDA's most stringent device marketing pathway, used for high-risk Class III devices.
510(k)
FDA premarket notification establishing substantial equivalence to a predicate device, the most common pathway for moderate-risk devices.
De Novo
FDA pathway for novel low-to-moderate risk devices that have no predicate.
PCCP
Predetermined Change Control PlanAn FDA-authorized plan that lets a manufacturer pre-specify certain device modifications (often AI/ML or security updates) and implement them post-clearance without a new submission, provided changes stay within the agreed protocol.
QSR
Quality System Regulation (21 CFR 820)FDA's current Good Manufacturing Practice requirements for medical devices, covering design controls, CAPA, document control, and production. Being replaced by QMSR in February 2026.
QMSR
Quality Management System RegulationFDA's updated quality system rule that harmonizes 21 CFR 820 with ISO 13485:2016. Takes effect February 2, 2026, replacing the legacy QSR.
Predicate
A legally marketed device used as the basis for a 510(k) substantial-equivalence claim. Cybersecurity comparisons to the predicate are increasingly scrutinized by FDA.
FD&C Act
Federal Food, Drug, and Cosmetic ActThe foundational U.S. statute giving FDA authority over food, drugs, and medical devices. Section 524B (added by the 2023 omnibus) created explicit cybersecurity authority for cyber devices.
Technical
CBOM
Cryptographic Bill of MaterialsAn emerging extension of the SBOM that catalogs cryptographic primitives, libraries, key sizes, and algorithms used by a device.
STRIDE
A threat modeling taxonomy (Spoofing, Tampering, Repudiation, Information disclosure, Denial of service, Elevation of privilege) widely used for medical device threat models.
SCA
Software Composition AnalysisTooling that scans software for known-vulnerable components and license risks, and is the primary mechanism for generating and maintaining an SBOM.
CVE
Common Vulnerabilities and ExposuresA public catalog of disclosed security vulnerabilities, each assigned a unique CVE ID. Used for tracking known issues against SBOM components.
CVSS
Common Vulnerability Scoring SystemAn open framework for scoring vulnerability severity (0.0–10.0) based on exploitability and impact. FDA expects manufacturers to triage findings using CVSS plus device-specific clinical impact.
CWE
Common Weakness EnumerationA community catalog of software and hardware weakness types (e.g., CWE-79 XSS, CWE-787 out-of-bounds write). Useful in threat modeling and root-cause analysis.
VEX
Vulnerability Exploitability eXchangeA machine-readable companion to an SBOM that states whether a known vulnerability actually affects a given product (e.g., 'not affected because component is not invoked'). Reduces noise from SBOM scans.
PKI
Public Key InfrastructureThe set of roles, policies, and systems for issuing, managing, and revoking digital certificates. Underpins device identity, signed firmware, and secure communications.
HSM
Hardware Security ModuleTamper-resistant hardware that generates, stores, and uses cryptographic keys. Often used in manufacturing to sign firmware and provision device identities.
mTLS
Mutual TLSTLS in which both client and server present and validate certificates. Common pattern for device-to-cloud and device-to-gateway authentication in connected medical devices.
OTA
Over-the-Air updateMechanism for remotely delivering signed firmware or software updates to deployed devices. FDA expects a documented, secure update path for the supported lifetime of the device.
Secure Boot
A boot process that cryptographically verifies firmware/software integrity before executing it, anchored in a hardware Root of Trust. Foundational control for tamper resistance.
Root of Trust
An immutable hardware or firmware element (e.g., fused public key, secure element) that anchors all higher-level trust decisions like secure boot and attestation.