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Old CVEs are still relevant

Old CVEs are still relevant

TIPS Publication date: 2023-08-15

Many organizations assume that Common Vulnerabilities and Exposures (CVEs) published a year or more ago are no longer relevant, especially if they did not initially match their infrastructure. However, this assumption can create dangerous security gaps.

 

Why CVEs Are Dynamic, Not Static

CVEs are not static records; they are continuously updated as new information becomes available. These updates may include:

 

  • Expanding the affected version range of a product, meaning systems previously considered safe may now be vulnerable.
  • Adding new vulnerable products that were not initially recognized as affected.
  • Providing additional exploit details, increasing the urgency of mitigation efforts.

 

This means that a CVE that originally seemed irrelevant may later become critical to your security posture. Regularly reviewing and updating vulnerability data is essential to ensure your infrastructure remains protected.

 

Understanding the Value of CVSS and EPSS

To effectively prioritize vulnerability management, organizations rely on two key scoring systems: CVSS (Common Vulnerability Scoring System) and EPSS (Exploit Prediction Scoring System).

 

CVSS: Assessing the Severity of Vulnerabilities

The CVSS score provides a standardized way to measure the severity of a vulnerability on a scale from 0 to 10, with higher scores indicating greater risk. CVSS consists of three key metric groups:

 

  • Base Score: Represents the intrinsic severity of a vulnerability, considering factors like exploitability and impact.
  • Temporal Score: Adjusts the severity based on factors such as the availability of an exploit or a vendor patch.
  • Environmental Score: Allows organizations to customize the score based on their own security environment and business impact.

 

By leveraging CVSS, security teams can prioritize vulnerabilities that pose the greatest risk to their systems and allocate resources accordingly.

 

EPSS: Predicting the Likelihood of Exploitation

While CVSS measures severity, the Exploit Prediction Scoring System (EPSS) predicts how likely a CVE is to be exploited in real-world attacks. Unlike CVSS, which focuses on technical details, EPSS is based on machine learning models that analyze:

 

  • The presence of active exploits in the wild.
  • Data from threat intelligence feeds.
  • Historical trends in attacker behavior.

 

EPSS scores range from 0 to 1, where higher values indicate a greater likelihood of exploitation. This scoring system is invaluable for organizations, as it helps them prioritize patching based on actual risk, rather than just theoretical severity.

 

Why Continuous CVE Monitoring Matters

Understanding both CVSS and EPSS allows security teams to make data-driven decisions about which vulnerabilities require immediate action. For example:

 

  • A high CVSS score (9.8) but a low EPSS score (0.02) may indicate that a vulnerability is severe but unlikely to be exploited soon.
  • A medium CVSS score (6.5) with a high EPSS score (0.85) suggests an urgent need for patching, as attackers are actively targeting this weakness.

 

By continuously updating CVE records and considering both severity and likelihood of exploitation, organizations can effectively manage their attack surface and minimize the risk of cyber incidents.

 

How BaseFortify Ensures Up-to-Date CVE Data

At BaseFortify.eu, we diligently update our CVE dataset, ensuring that:

 

✅ Newly discovered vulnerabilities are added as soon as they are published.
✅ Existing CVEs are continuously refreshed, capturing changes in affected versions, exploit availability, and scoring adjustments.
✅ CVSS and EPSS scores are factored into risk assessments, helping organizations prioritize their security efforts effectively.

 

Staying ahead of threats requires more than just identifying vulnerabilities—it demands proactive monitoring and intelligent prioritization. Organizations that rely on outdated CVE data risk leaving critical gaps in their security posture.

 

Final Thoughts

Cyber threats are constantly evolving, and vulnerabilities that seem irrelevant today may become critical tomorrow. By maintaining an updated and prioritized approach to CVEs, incorporating CVSS and EPSS scores, and leveraging real-time intelligence, organizations can reduce risk exposure and stay ahead of cyber attackers.

 

For more insights and the latest updates on CVEs, visit:
🔗 BaseFortify CVE Reports