Key Takeaways
- A CVE is a globally unique identifier for a publicly disclosed software vulnerability, enabling vendors, researchers, and defenders to reference the same consistently.
- An organization’s approach to vulnerability disclosure – including coordinated fixes, researcher engagement, and accurate software inventory – is a strong indicator of overall security maturity.
- Commvault protects its customers with a CVE program of transparency, cadence, and clarity. CVE disclosure says a great deal about the maturity of a security and engineering program.
Why This Matters
Many breaches that reach the boardroom trace back to vulnerability in software. The mechanism the entire industry uses to name and describe those vulnerabilities is the CVE, Common Vulnerabilities and Exposures.
How a vendor, or your own organization, handles CVEs is one of the clearest signals of security maturity.
A company that discloses and credits researchers fairly is usually a company that takes underlying engineering seriously. This blog explains how a CVE is built, who runs the system, and what separates an exemplary disclosure from a poor one.
Beyond the CVE: Why Disclosure Philosophy Matters
Publishing a CVE is table stakes. The differentiators are: transparency of the vulnerability and patch, regular scans and patching, and clear communication.
Commvault treats disclosure as an engineering and security discipline rather than a compliance checkbox: Establish a cadence for code review and remediation, communicate the fix in plain language, and protect our customers. That consistency, more than any single score, is what CVE disclosure says about security maturity.
What a CVE Actually Is
A CVE is not a patch, a score, or a piece of malware. It is a dictionary entry that gives one specific, publicly known vulnerability a permanent, unique name so that everyone can refer to it.
The identifier itself follows a simple, durable format: the letters CVE, the year the ID was assigned, and a sequence number, for example, CVE-2021-44228.
The scale of the program is enormous, and still growing: 48,000 CVEs were published in 2025, on the order of 132 per day, up more than 260% since 2020.
The Anatomy of a Single Record
CVE publications require a consistent set of elements. Reading one is straightforward once you know what each part is for:
- Identifier, the unique CVE-YYYY-NNNNN
- Description, a concise explanation of the vulnerability: what it is and how a threat actor could exploit it.
- Affected products and versions, which software, hardware, or firmware (and which versions) are impacted, and which versions contain the fix.
- Criticality, the underlying category of criticality.
- References, links to the vendor advisory, the patch, and technical write-ups.
The Supporting Cast: CVSS, CWE, EPSS, and KEV
Four companion systems turn a CVE into something a business can prioritize. They are easy to confuse, so the distinction is worth holding onto:
- CVSS (Common Vulnerability Scoring System) answers “How severe is it?” CVSS is the severity rating (1–10, 10 being the most severe) of the flaw, not a measurement of your specific exposure.
- EPSS (Exploit Prediction Scoring System) answers “How likely is this to be exploited soon?” EPSS produces a probability score, from zero to 100 percent, estimating the likelihood that a vulnerability will be exploited in the next 30 days.
- CWE (Common Weakness Enumeration) answers “What kind of mistake caused it?” The CWE classifies the underlying coding weakness.
- KEV (Known Exploited Vulnerabilities) answers “Is it being used against people right now?” The KEV catalog is a curated list of CVEs with confirmed real-world exploitation.
A high CVSS score tells you how serious a vulnerability could be, a high EPSS score tells you how soon it is likely to be exploited, and a listing in the KEV catalog confirms exploitation is already happening. The best vulnerability programs weigh all three.
FAQs
Q: What is a CVE, and why is it important?
A: A Common Vulnerability and Exposure (CVE) is a standardized identifier assigned to a publicly disclosed software vulnerability. It enables everyone – from vendors and researchers to regulators and customers – to refer to the same vulnerability without ambiguity.
Q: What information should a well-formed CVE record contain?
A: A complete CVE record requires a unique identifier, a description of the vulnerability, affected products and versions, the criticality type, and references to vendor advisories or patches. These elements enable organizations to understand their exposure and respond efficiently.
Q: How do CVSS, CWE, EPSS, and KEV differ from a CVE?
A: A CVE identifies a specific vulnerability, while CVSS measures its severity, EPSS estimates the likelihood of near-term exploitation, CWE classifies the underlying coding weakness, and KEV identifies vulnerabilities that are actively exploited in the real world. Together, these frameworks help provide the context needed to prioritize remediation.
Q: What does Commvault look for in its own disclosure practices?
A: Commvault holds its own disclosures to the same standard it expects of others: transparency, cadence and clarity. That is how Commvault protects its customers.
Q: What should business leaders evaluate when assessing vendors’ vulnerability management practices?
A: Leaders should look for coordinated disclosure timelines, comprehensive and accurate CVE records, clear remediation guidance, robust reporting programs, and the ability to quickly determine whether products are affected by newly disclosed vulnerabilities. These characteristics reflect a strong security culture and improve organizational resilience.
Werner Nel is Principal Product Experience Manager at Commvault.