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Each Monday, the Tenable Exposure Management Academy provides the practical, real-world guidance you need to shift from vulnerability management to exposure management. In this post, Tenable’s chief security officer Robert Huber looks at how exposure management can help you move beyond silos. You can read the entire Exposure Management Academy series here.The way we use technology — in IT, cloud security, operational technology (OT), internet of things (IoT), AI and countless applications — has led to a corresponding array of specialized security tools. Think about all the tools you use: vulnerability assessment, identity security, endpoint detection and response (EDR), data loss prevention (DLP), cloud native application protection platforms (CNAPP), mail protection, cloud access security broker (CASB), mobile device management (MDM) and privilege access management (PAM). That’s a lot of tools — and a lot of silos. But it doesn’t end there. Each of those tools has a subset of capabilities that can result in even more silos across your security program. Of course, all of this reflects the issues we face and the way our organizations are structured. But, sadly, attackers don’t care about our org charts or toolsets. And thank goodness they haven’t figured out how to use pivot tables yet!They just look for weaknesses, exploit them and move laterally across domains to achieve their goals. In fact, those silos we’ve built can inadvertently help them by hindering communication and context between teams, making it difficult to see our true exposures — or the risks that pose a real threat.As a security leader myself, I know this pain firsthand. Buried in fragmented dataBefore adopting a more unified approach, I constantly felt like I was buried in fragmented data from countless tools and teams. Much of my day was lost to context-switching, trying to manually piece together a coherent picture from disconnected silos. This makes communicating clear priorities incredibly difficult. You often can't compare apples-to-apples, leading to subjective decisions about which risk truly matters most. It’s an exhausting, inefficient cycle that makes it hard to confidently answer a key question: "What should we focus on right now?" It also makes it tough to report accurately on our risk posture.This struggle highlights why distinguishing significant exposures from the background noise of all possible weaknesses is so critical for effective risk management. If you want to reduce your risk, you need to identify the problems that truly matter most to your organization. Key questions to ask yourself as you evaluate your organization’s exposures include:Is it preventable? Most breaches start with something that could have been fixed, such as a misconfiguration, a known vulnerability or unnecessary privileges.Is it exploitable? An attacker needs a way to actually use the weakness. This could be via a known exploit code, weak passwords or multi-factor authentication (MFA) identity compromise.Is it impactful? A weakness that results in lost revenue, data theft or operational downtime could significantly harm the organization's mission. Linking technical risk to potential business impact is key.What’s holding security leaders back?Too often, we approach security in fragments, unlike attackers who look for any viable path. This leaves us struggling to be strategic. Some of the common roadblocks include:Lack of a unified view: Different tools focus on specific domains or risk types, so no single platform provides a complete view of the attack surface.Inconsistent risk scoring: Each tool uses its own metrics, which makes it hard to compare relative risk across the environment or understand the cumulative risk associated with critical assets.Missing technical context: If you don’t connect the dots between assets, identities and their associated risks, it's impossible to understand the likely attack paths available to adversaries.Missing business context: Security data often lacks information about which assets support critical business functions, hindering the ability to prioritize based on potential business impact.Proactive prevention just makes senseHistorically, a significant portion of our security investments focused on detecting and responding to attacks already in progress. This makes sense because it’s where breaches cause obvious damage.But regulations and best practices are changing. Rules from the U.S. Securities and Exchange Commission (SEC) (requiring reporting of material impact within four days for public companies) and the Cybersecurity and Infrastructure Security Agency (CISA) (requiring reporting of “substantial cyber incidents” within three days for critical infrastructure) mandate much faster transparency and accountability. The timeframe for understanding and disclosing significant incidents is shrinking dramatically.This pressure, combined with the high cost of breaches, increases the strategic importance of finding and fixing significant exposures before they lead to reportable incidents and material impact. Investing proactively in understanding and reducing exposure is often far less costly and disruptive than managing the fallout of a major breach. Reduce risk and increase security ROI.Optimizing prioritization and preventing breachesUnderstanding how breaches happen and the limitations of siloed security points to the need for a more integrated, exposure-focused strategy. This isn't about abandoning detection and response capabilities. On the contrary, it’s about augmenting those capabilities by strengthening preventative security to better understand and prioritize risks before they cause harm.Solving this requires a structured approach. As my colleague Nathan Dyer wrote in Five Steps to Move to Exposure Management, the core principles involve:Gaining comprehensive visibility across the entire attack surface, including assets and identitiesIdentifying all forms of preventable risk, such as vulnerabilities, misconfigurations and privilege issues with consistent, contextualized scoringCritically aligning technical risk with business context to understand potential impact and prioritizing remediation on the exposures and attack paths, including key choke points, that pose the greatest threat to critical functionsContinuously measuring and communicating exposure to optimize security investments and report effectively to stakeholders, including the boardExposure management platforms support this lifecycle, providing capabilities to aggregate disparate data, calculate risk scores (like asset exposure scores, vulnerability priority rating, asset criticality rating) that incorporate exploitability and criticality, map assets to business functions, visualize attack paths, identify choke points for efficient remediation, and provide dashboards for tracking and reporting exposure trends against internal goals or industry benchmarks.Ultimately, by breaking down data silos and adopting an exposure management mindset, security leaders can gain a more holistic view of their attack surface and true business risk. This enables better resource allocation, more defensible prioritization, clearer communication about security posture and, ultimately, a more effective preventative security program aligned with organizational objectives.TakeawaysHere’s my advice to security leaders fighting silos and looking to move to exposure management.Think like an attacker: Adversaries exploit seams between siloed views. Security strategy must strive for a unified understanding of the attack surface.Focus on material exposure: Prioritize risks that are preventable, exploitable and demonstrably impactful to critical business functions, not just technically severe in isolation.Drive strategic outcomes: Implementing an exposure management approach enables more effective resource allocation, clearer communication of risk posture to stakeholders (including the board) and ultimately, a more defensible and efficient security program.Have a question about exposure management you’d like us to tackle?We’re all ears. 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Analysis Summary
# Best Practices: Adopting Exposure Management to Reduce Cyber Risk
## Overview
These practices focus on transitioning from siloed security operations (like managing vulnerabilities, cloud, or identity separately) to an integrated **Exposure Management** approach. This unified strategy aims to gain end-to-end visibility across the entire attack surface, prioritize remediation efforts against likely threats, and effectively communicate cyber risk to support optimal business performance.
## Key Recommendations
### Immediate Actions
1. **Establish Comprehensive Asset Inventory:** Immediately begin the process of aggregating all assets (IT, Cloud, OT/IoT, Identities) into a single, unified inventory view.
2. **Integrate Third-Party Data Sources:** Utilize connectors to seamlessly combine data from existing security tools (Vulnerability Scanners, CIEM, CNAPP, etc.) with data from your primary exposure management platform.
3. **Prioritize Exposure Based on Threat Intelligence:** Shift vulnerability remediation from solely relying on CVSS scores to prioritizing based on active exploitability and business context to prevent likely attacks.
### Short-term Improvements (1-3 months)
1. **Implement Exposure Analytics:** Begin using analytics capabilities to visualize aggregated risk data, correlate findings across different domains (e.g., vulnerable asset exposed via an identity flaw), and measure security hygiene trends.
2. **Establish Coordinated Incident Response Procedures:** Develop processes for "Emergency Response" that leverage cross-domain data to accurately scope and address high-impact incidents quickly.
3. **Define Exposure Prioritization Metrics:** Standardize risk scoring that fuses vulnerability data, asset criticality, and external threat context, moving beyond individual tool outputs.
### Long-term Strategy (3+ months)
1. **Drive Security Hygiene Programs:** Institutionalize continuous monitoring and remediation focused on improving overall security hygiene metrics across all asset classes (Cloud, Traditional IT, OT).
2. **Integrate Identity Exposure Management (CIEM):** Incorporate continuous monitoring of identity and access privileges into the overall exposure management program to address one of the most critical vectors for breach.
3. **Mature Risk Communication:** Implement standardized reporting that translates technical exposure into business risk metrics, facilitating informed decision-making by executive leadership.
## Implementation Guidance
### For Small Organizations
- **Focus on Core Asset Discovery:** Start by ensuring comprehensive inventory for traditional IT and any current cloud usage. Consider managed services or simpler integrated solutions to avoid managing multiple complex platforms in isolation.
- **Leverage Integrated Tools:** Adopt a platform that offers core vulnerability management integrated with basic cloud security posture management to reduce tool sprawl.
### For Medium Organizations
- **Prioritize Cross-Domain Connectors:** Actively seek integration between existing vulnerability scanners and cloud security tools using platform connectors to build a holistic view without replacing all legacy tools immediately.
- **Resource Allocation for Prioritization:** Assign a dedicated team member or allocate explicit time for reviewing prioritized remediation lists that incorporate threat context, rather than traditional backlog management for each silo.
### For Large Enterprises
- **Standardize on a Unified Platform:** Invest in a dedicated Exposure Management platform capable of ingesting data from diverse environments (including Operational Technology/IoT and complex cloud estates).
- **Mandate Cross-Functional Ownership:** Formally mandate cooperation between IT Ops, Security Engineering, Cloud Security, and Identity teams, using the unified exposure management console as the single source of truth for risk remediation efforts.
- **Establish Formal Cyber Risk Reporting:** Develop governance around the metrics produced by the exposure analytics engine for board-level reporting.
## Configuration Examples
*(Note: The source material focuses on platform concepts rather than specific command-line configurations. The following recommendations guide platform setup based on the concepts mentioned.)*
**Asset Prioritization Configuration (Conceptual):**
1. **Asset Criticality Tagging:** Configure asset databases to associate every asset with a business criticality tier (e.g., Tier 1: Mission Critical, Tier 3: Non-Essential).
2. **Threat Context Mapping:** Configure the system to integrate real-time threat intelligence feeds (e.g., actively exploited vulnerabilities).
3. **Risk Scoring Formula:** Implement a custom formula where **Prioritization Score = Vulnerability Risk (CVSS/VPR) * Asset Criticality * Exploitability in Wild.**
**Cloud Security Posture Management (CNAPP) Configuration Principle:**
- Ensure configuration captures both infrastructure vulnerabilities **and** misconfigurations (IaC scanning) alongside entitlement risks (CIEM).
## Compliance Alignment
The principles of Exposure Management directly support maturity models outlined by several key standards:
- **NIST Cybersecurity Framework (CSF):** Strengthens the **Identify** function (Asset Management) and enhances processes within **Protect** and **Detect** by improving situational awareness and response prioritization.
- **ISO 27001/27002:** Supports requirements related to managing technical vulnerabilities and ensuring effective operational security practices.
- **CIS Critical Security Controls (CSC):** Aligns closely with CSC 1 (Inventory and Control of Enterprise Assets) and CSC 7 (Vulnerability Management) by providing a unified mechanism for execution and reporting.
## Common Pitfalls to Avoid
- **Maintaining Siloed Remediation Backlogs:** Do not allow individual teams (e.g., Patch Management team, Cloud team) to continue working off separate, siloed vulnerability lists if an integrated platform is in use.
- **Ignoring Identity Risks:** Treating identity and privileges as separate from infrastructure vulnerabilities is a critical oversight; misconfigured entitlements often provide the easiest path to exploitation.
- **Over-relying on Raw CVSS Scores:** Using only the base Common Vulnerability Scoring System magnitude ignores business impact and current threat activity, leading to wasted effort on low-impact, high-score findings.
- **Not Automating Data Ingestion:** Failure to implement platform connectors results in stale or incomplete data, undermining the 'single source of truth' goal of exposure management.
## Resources
- **Tenable One Platform:** A primary example of a platform designed to unify Vulnerability, Cloud, OT/IoT, and Identity exposure data.
- **Threat Intelligence Feeds:** Integrate industry-vetted feeds (e.g., recognized CISA KE lists) into the prioritization engine to drive actionability.
- **Cyber Hygiene Frameworks:** Utilize established security hygiene best practices (e.g., those promoted by CISA or major vendors) as targets for continuous improvement metrics within the exposure management console.