Vulnerability management

What is vulnerability management?

Vulnerability management (VM) is the continuous, systematic process of identifying, evaluating, reporting, and remediating vulnerabilities existing in cyber assets, processes, endpoints, and systems.

Adversaries are constantly scanning for exploitable gaps, making vulnerability management an ongoing discipline that helps organizations recognize and fix these gaps before adversaries find and weaponize them.

The global average cost of a data breach stands at $4.44 million, per IBM’s 2025 report. This includes disruptions, loss of customer trust, and regulatory fines, making proper vulnerability management critical.

Vulnerability management vs. patch management: Are they the same?

No.

Patch management involves the deployment of a solution, such as a software update, to fix a vulnerability.

Vulnerability management, on the other hand, encompasses the broader process of identifying, assessing, and addressing all categories of vulnerabilities through diverse strategies.

The strategic benefits of vulnerability management

Effective vulnerability management brings numerous benefits:

• Improved asset visibility. Unified visibility across business applications and endpoints creates a baseline for capacity planning, license management, and technology refresh cycles.
• Fewer security risks. VM also directly reduces the probability of successful cyberattacks by systematically identifying and addressing exploitable weaknesses.
• Enhanced operational efficiency. Mature vulnerability management programs establish structured processes for security remediation, replacing ad hoc firefighting with systematic resolution workflows.
• Prevention of business disruption. The financial hit of a breach doesn’t stop at ransom payments. Operational disruption, reputational damage, customer attrition, and regulatory penalties often dwarf the costs of immediate incident response (IR).
• Support for compliance and audit requirements. From PCI-DSS to HIPAA, regulatory requirements mandate regular vulnerability assessments, including documented vulnerability management processes and evidence of continuous improvement.

What are the types of managed vulnerabilities?

Vulnerabilities manifest across diverse technical domains, with multiple types requiring specialized assessment approaches and remediation strategies:

• Software vulnerabilities: These bugs in application code, operating systems, firmware, or supporting libraries remain the most prevalent, particularly as complex application portfolios span legacy systems, commercial off-the-shelf products, and custom-developed code.
• Hardware vulnerabilities: These exist within the physical components and embedded firmware of computing devices and are especially relevant for on-premises infrastructure, which can be locally exploited.
• Network vulnerabilities: Arising from misconfigurations, design flaws, or network infrastructure and protocol weaknesses, network vulnerabilities often serve as force multipliers, allowing attackers who gain initial access to expand their presence across your entire environment.
• Process vulnerabilities: Weaknesses in operational procedures, change management practices, and organizational workflows are human and procedural gaps that can be as consequential as technical weaknesses.
• Control vulnerabilities: Encompassing weaknesses in security mechanisms themselves, i.e., the systems designed to prevent, detect, or respond to threats, this type of vulnerability includes: 
  • Inadequately tuned intrusion detection systems that generate false negatives
  • Logging configurations that fail to capture security-relevant events
  • Backup processes that cannot support timely recovery
  • Incident response procedures that prove inadequate during actual crises
• Mixed vulnerabilities: These represent complex weaknesses that span multiple categories, requiring coordinated remediation across technical domains.

How does vulnerability management work?

An effective vulnerability management process has overlapping phases that feed insights from one stage into another. This cyclical approach helps ensure that the process matures over time by incorporating lessons learned from one stage into another.

The five steps involved in the vulnerability management process are discovery, prioritization, resolution, verification, and reporting.

Step 1: Discovery

Discovery lays the foundation for effective vulnerability management. It encompasses the identification of vulnerable assets and data flows using scanners, agents, or pen tests:

• Vulnerability scanners: Scan infrastructure for vulnerabilities present in the CVE database; classified into what they scan and how they scan, i.e., network-based, host-based, or web-based
• Agent-based scans: Scan endpoints, servers, and workstations using lightweight software agents to identify vulnerabilities missed by external scanners, e.g., local privilege escalation, insecure configurations in applications that don't expose network services, and compliance violations in endpoint security controls
• Penetration tests: Employ white-hat hackers to identify vulnerabilities; more resource-intensive than agents but can uncover complex weaknesses scanners miss, plus validate the exploitability of found vulnerabilities

The next phase involves making sure the right vulnerabilities receive attention first.

Step 2: Prioritization

A common vulnerability prioritization approach uses the Common Vulnerability Scoring System (CVSS). CVSS provides severity ratings based on technical characteristics, for example, potential impact, attack complexity, or privileges needed. A CVSS score of zero indicates the lowest possible severity, while 10 is the highest.

However, CVSS scores don't account for asset criticality and threat context, making these scores alone insufficient for business risk prioritization.

For this, the Exploit Prediction Scoring System (EPSS) helps by augmenting CVSS with an assessment of how likely a vulnerability will be exploited within the next 30 days.

Still, effective vulnerability prioritization extends beyond scoring systems. The business context is also important. So, instead of solely prioritizing vulnerabilities based on their severity scores or the likelihood of exploitation, organizations must pause and ask:

Is my business at risk? If yes, what applications are at risk, and how will their exploitation affect business operations?

Of course, there is then the task of successfully resolving vulnerabilities found.

Step 3: Resolution

Vulnerability resolution can follow three possible paths: remediation, mitigation, or containment. And sometimes, a mix of all three.

Remediation 

Remediation involves eliminating a vulnerability from the source via patch application, version upgrades, or configuration corrections.

Although this is the ideal resolution approach, it isn't always immediately feasible. Why? An organization’s legacy systems may lack vendor support, while critical applications may also require extensive testing before patching.

Mitigation

Mitigation reduces risk exposure in the event of actual exploitation. Example techniques for this approach to vulnerability resolution include network segmentation, firewalls that filter exploit attempts, and enhanced monitoring to provide early warning of exploitation attempts.

Containment 

Containment isolates vulnerable systems from healthy ones while remediation measures are developed and deployed. This approach proves particularly valuable when actively exploited vulnerabilities affect critical systems that cannot be patched immediately.

Step 4: Verification

Verification confirms that your previous resolution efforts successfully addressed the identified vulnerabilities without introducing operational problems. This ensures CISOs and the rest of the C-suite that holes believed to be plugged are not, in fact, still leaking.

A common way to verify resolution is to conduct post-remediation scans or even pen testing for vulnerabilities involving multiple systems.

Verification also includes operational validation to check that security fixes haven't degraded system functionality or user experience.

If this step reveals incomplete fixes or any new issues caused during resolution, the next step is a root cause analysis to identify gaps in scanning, remediation procedures, testing protocols, or change management processes.

Step 5: Reporting

CISOs rely on two metrics to reveal gaps in vulnerability management workflows and provide objective measures of program maturity:

• Mean time to detect (MTTD): Measures the speed of identification of new vulnerabilities
• Mean time to remediate (MTTR): Quantifies the average duration between vulnerability detection and successful resolution

With the right tools, companies can typically achieve MTTD in hours and MTTR in days for critical vulnerabilities, instead of weeks or months. This highlights that an organization’s choice of solution is a key part of the vulnerability management process.

What to look for in vulnerability management tools

When evaluating vulnerability management solutions, prioritize tools with the following capabilities.

Comprehensive visibility across hybrid environments

The ideal tool should discover and assess your assets regardless of where they’re hosted—on-prem, multiple cloud platforms, remote endpoints, or containerized workloads.

To check the tool’s ability to comprehensively discover assets, ask the following questions:

• Does the solution natively integrate with CSPs’ APIs?
• Does it support diverse operating systems?
• Can it assess both traditional and modern infra?

Risk contextualization through embedded threat intelligence

For the sake of your business, tools that use generic severity scores are inadequate. Opt for a solution that:

• Layers your business context onto technical risk
• Considers asset criticality within the context of your industry
• Understands the data sensitivity requirements of your organization

The result of opting for such a solution is vulnerability prioritization that reflects genuine business risk rather than theoretical severity.

Streamlined workflow integration

The ideal vulnerability tool should naturally integrate with your existing operational workflows instead of creating parallel shadow processes. The integration should be smooth and easy, as integration difficulties can significantly reduce your ROI from vulnerability management.

Actionable reporting for diverse audiences

It’s a best practice to choose a solution that provides relevant, easy-to-understand, and easy-to-apply security reports. This allows your security team to immediately understand what steps to take next.

Automated change management with rapid response

The best solutions incorporate automation to accelerate every phase of the vulnerability management lifecycle. This shortens MTTD and MTTR, and improves your overall security posture.

Manage your vulnerabilities with Horizon AppViz

AlgoSec Horizon AppViz delivers business-specific value by prioritizing a detected vulnerability risk not only by severity but also by business criticality. This helps you:

• Focus on the most important vulnerabilities first
• Contextualize your risk reduction efforts within a business application perspective

Also, in your on-prem and cloud environment, Horizon AppViz incorporates data about your exposure level into risky firewall rules and into the what-if risk check analysis report you'll get periodically.

Ready to prioritize vulnerabilities based on your business operations and automate the isolation of infected servers?

Schedule a demo of AlgoSec to see how.