CVE and Vulnerability Tracker
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Browse cybersecurity research, threat data, attack techniques, statistics, and compliance guides on CyberSanso. Free to use, updated regularly.
CVE and Vulnerability Tracker: Search, Filter, and Prioritize Known Vulnerabilities
The CVE system is the closest thing the security industry has to a shared language for software vulnerabilities. Every CVE identifier represents a publicly disclosed flaw that has been documented, scored, and made searchable across thousands of security tools, patch management platforms, and vulnerability scanners. CyberSanso’s CVE tracker aggregates this data and filters it by severity, vendor, affected system, and exploitation status so you can quickly identify what matters for your environment.
The tracker draws from the NIST National Vulnerability Database (NVD), the MITRE CVE List, vendor security advisories, and the CISA Known Exploited Vulnerabilities (KEV) catalog. Each entry includes the CVE ID, CVSS v3.1 base score, EPSS exploitation probability score, affected software and version ranges, available patches or mitigations, and a KEV flag where applicable.
Vulnerability prioritization is the core problem this tracker addresses. A typical large enterprise environment has tens of thousands of unpatched CVEs at any given time. Patching them in CVSS score order without considering exploitation likelihood, asset criticality, and active threat actor targeting leads to wasted remediation effort. The combination of CVSS, EPSS, KEV status, and asset exposure data provides a defensible, evidence-based prioritization framework.
How the CVE System Works: From Discovery to Database
A CVE (Common Vulnerabilities and Exposures) entry begins when a researcher, vendor, or security team discovers a software flaw and reports it to a CVE Numbering Authority (CNA). CNAs are authorized organizations (including most major software vendors and many security research firms) that assign CVE IDs within their scope. MITRE coordinates the overall CVE program.
Once a CVE is assigned, the NIST National Vulnerability Database (NVD) enriches it with a CVSS score, Common Weakness Enumeration (CWE) classification, Common Platform Enumeration (CPE) data identifying affected products, and reference links. The NVD typically processes new CVEs within 48 to 72 hours of publication, though backlogs have grown as CVE volume has increased: over 40,000 CVEs were published in 2024, and 2025 exceeded that figure.
Two scoring systems govern vulnerability prioritization: CVSS (Common Vulnerability Scoring System) provides a 0 to 10 severity rating based on exploitability and impact characteristics at the time of publication – it does not factor in whether a vulnerability is actually being exploited. EPSS (Exploit Prediction Scoring System) provides a probability score (0 to 100%) estimating the likelihood that a given CVE will be exploited in the wild within 30 days. EPSS is computed using machine learning on 1,500+ features including CVE metadata, social media mentions, and exploitation signals from sensor networks. Research shows that EPSS outperforms CVSS as a predictor of real-world exploitation.
CVE versus CWE: a CVE identifies a specific vulnerability in a specific product. A CWE (Common Weakness Enumeration) describes the class of programming error that caused it. CVE-2021-44228 (Log4Shell) is an instance of CWE-917 (Improper Neutralization of Special Elements). Understanding the CWE helps security teams identify the same class of vulnerability across their codebase, not just the specific disclosed instance.
- CVSS v3.1 and v4.0 scoring with Base, Temporal, and Environmental vectors
- EPSS exploitation probability alongside CVSS for better prioritization
- CISA KEV status flag: confirmed exploited in the wild
- Affected CPE data filtered by vendor, product, and version range
How to Prioritize CVE Remediation Without Patching Everything
The average enterprise has over 75,000 vulnerabilities in its environment at any time (Tenable Research). Patching every CVE on a CVSS-first basis is operationally impossible and strategically counterproductive: a Critical CVSS 9.8 vulnerability with zero known exploits and no attacker interest should rank below a High CVSS 7.5 vulnerability that CISA has confirmed is being actively exploited against organizations in your sector.
A practical prioritization framework uses three filters applied in order:
Filter 1 – KEV status: Any vulnerability on the CISA KEV catalog should be treated as the highest-priority remediation regardless of CVSS score. These are confirmed exploited vulnerabilities. US federal agencies are legally required to patch them within defined windows; all other organizations should treat KEV entries as a minimum baseline for their patch programs.
Filter 2 – EPSS probability: Of the remaining vulnerabilities not on KEV, sort by EPSS score. An EPSS score above 0.10 (10%) indicates meaningful exploitation risk within the next 30 days. Research from FIRST (Forum of Incident Response and Security Teams) shows that targeting the top 2% of CVEs by EPSS score captures 82% of exploited vulnerabilities while requiring remediation of far fewer entries than CVSS-first approaches.
Filter 3 – Asset criticality and exposure: Apply your internal asset criticality ratings to the filtered list. A CVSS 9.0 vulnerability on an isolated development server is lower priority than the same vulnerability on an internet-exposed production application with customer data. This context layer – which no external database can provide for you – is what transforms a generic vulnerability list into a defensible remediation roadmap.
Most Critical CVEs in 2025 and 2026
Tracking which CVEs threat actors are actively weaponizing is more operationally useful than tracking all new publications. The following CVE classes drove the most significant incidents in 2025 and into 2026, based on CISA KEV additions, Verizon DBIR data, and CrowdStrike threat reporting:
Perimeter device vulnerabilities: VPN appliances, edge routers, and firewall management interfaces remained the highest-priority targets for initial access. CVEs in Ivanti Connect Secure, Fortinet FortiOS, Palo Alto Networks PAN-OS, and Cisco IOS XE were among the most exploited in this class. The Verizon 2026 DBIR found vulnerability exploitation surpassed stolen credentials as the top initial access vector, now accounting for 31% of all breach entry points – up from 20% in 2025.
Supply chain and open source vulnerabilities: Third-party component vulnerabilities reached 48% of all breaches in the 2026 DBIR, nearly double the prior year. The ongoing impact of Log4Shell (CVE-2021-44228) continued to register in post-breach investigations years after publication, underscoring that remediation rates for complex, deeply embedded vulnerabilities remain problematic.
Zero-day exploitation timelines: Google Project Zero and Mandiant data show that the time between vulnerability disclosure and active exploitation continued to compress in 2025-2026. For high-profile CVEs in widely deployed enterprise software, exploitation began within 24 to 48 hours of public disclosure in several cases – compressing the remediation window to near-zero for internet-exposed systems.
CVE Lookup Tools and Vulnerability Databases
Multiple databases and tools provide CVE lookup and vulnerability tracking capabilities, with different strengths across research depth, real-time data, and integration options:
NIST NVD (nvd.nist.gov): The authoritative source for CVE enrichment data including CVSS scores, CWE classifications, and CPE data. Primary integration target for most vulnerability management tools. NVD has experienced processing backlogs since early 2024 and announced a partnership with the CVE Program to address enrichment delays.
MITRE CVE List (cve.mitre.org): The primary source of CVE IDs and basic vulnerability descriptions before NVD enrichment. Useful for the most recently published CVEs that NVD has not yet processed.
Exploit-DB (exploit-db.com): Maintained by Offensive Security, this database catalogs known public exploits organized by CVE and vulnerability type. Essential for understanding exploitation feasibility.
EPSS API (api.first.org/epss): FIRST provides daily-updated EPSS scores via API. Free to access. Integrating EPSS data alongside NVD data transforms CVSS-only workflows into risk-prioritized remediation queues.
VulnDB (vulndb.cybersecurity.works): Broader than NVD in scope; includes vulnerabilities not submitted to the CVE program. Used by commercial vulnerability management platforms for comprehensive coverage.
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Suspendisse ut ultricies augue. Sed at leo vitae tempus. Quisque a vel nulla vestibulum eleifend at id augue. Nullam volutpat justo eget justo finibus mattis. Nam, massa sit amet euismod fermentum.
Suspendisse ut ultricies augue. Sed at leo vitae tempus. Quisque a vel nulla vestibulum eleifend at id augue. Nullam volutpat justo eget justo finibus mattis. Nam, massa sit amet euismod fermentum.
Suspendisse ut ultricies augue. Sed at leo vitae tempus. Quisque a vel nulla vestibulum eleifend at id augue. Nullam volutpat justo eget justo finibus mattis. Nam, massa sit amet euismod fermentum.
Suspendisse ut ultricies augue. Sed at leo vitae tempus. Quisque a vel nulla vestibulum eleifend at id augue. Nullam volutpat justo eget justo finibus mattis. Nam, massa sit amet euismod fermentum.