The software understanding gap is the mismatch between the complexity of software and the ability of the people who depend on it to verify what it does. In a report described by SecurityWeek on January 17, 2025, CISA, DARPA, the Office of the Under Secretary of Defense for Research and Engineering (OUSD R&E), and the NSA called for coordinated action to narrow that gap across national security and critical infrastructure systems.
What is the software understanding gap?
Software manufacturers can build and update complex systems faster than mission owners and operators can establish what those systems do, including behaviors that may affect security or operations. The issue is not simply whether software contains defects; it is whether the organizations relying on it have enough capacity to understand and verify its behavior.
SecurityWeek quotes the joint agency report as describing a decades-long imbalance: “The software understanding gap arises from a decades-long disparity of technical investment in software development capabilities unmatched by similar investments in understanding capabilities. The resulting software understanding gap is already extensive.”
Why does the gap matter?
When operators cannot adequately understand software behavior, they may struggle to build secure systems, remediate defects after discovery, maintain software at mission-relevant speed and scale, and defend against exploits. SecurityWeek quotes the report: “This gap leads to an inability to create software that is secure by design, remediate defects once discovered, maintain software at the speed and scale of mission relevance, and secure software against exploits.”
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The risks are operational as well as cybersecurity-related. Operators may not identify every software behavior that could jeopardize a system, while organizations can expend significant resources upgrading and patching software already deployed. That makes understanding a continuing maintenance and mission-readiness concern, not only a development-stage task.
Which systems are in scope?
SecurityWeek’s summary of the report spans software-controlled systems across information technology and critical infrastructure. Its examples include:
- Software on endpoints and servers.
- Information and communications technology.
- Operational technology used in military, space, manufacturing, energy-grid, and transport settings.
- Artificial intelligence-based systems.
This is the article’s summary of the scope, not an exhaustive definition of every system covered by the joint report.
What action are the agencies calling for?
The recommendations described by SecurityWeek combine several levers rather than proposing a single technical fix. They are complementary measures, not a ranked list.
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| Lever | How it is meant to help |
|---|---|
| Government coordination, policy, and legal requirements | Align government action and establish expectations that address the understanding gap. |
| Procurement and trusted third-party attestation | Encourage manufacturers to strengthen secure-by-design programs and customers to procure software that has undergone a trusted attestation process. |
| Technical solutions | Improve the ability to analyze and verify software behavior. |
| Research, engineering, and support investment | Build the capabilities needed to understand software at a scale and pace that match mission needs. |
Attestation is one proposed procurement mechanism: a trusted third party evaluates or attests to software or a manufacturer’s practices so customers have an additional basis for procurement decisions. The article does not specify a single attestation standard, certification, or implementation process.
What would closing the gap look like in practice?
The intended outcome is that operators can ask mission-related questions about the systems they rely on and receive answers quickly and confidently enough to act. SecurityWeek quotes the report: “To engender high confidence in national security and critical infrastructure systems, mission owners and operators must be able to routinely pose mission-related questions of these systems and receive thorough answers with the speed and confidence the mission demands.”
That goal links software understanding to operational decision-making: organizations need more than a record that software passed a check at one point in time. They need the capacity to investigate behavior, respond to discovered defects, and maintain systems as mission requirements evolve.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What is established about the scale of the problem?
The SecurityWeek article does not provide a named statistic for the gap’s prevalence, financial cost, or size, so a precise numerical estimate is not established here. It reports the agencies’ characterization of the gap as extensive and describes the classes of systems and operational difficulties at issue, but offers no quantified measure.
SecurityWeek published Ionut Arghire’s report on January 17, 2025. The article links to the CISA report, but the CISA resource page and PDF were not accessible for direct review. Accordingly, the report’s scope and recommendations here are attributed to the joint agency report as quoted or summarized by SecurityWeek.
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