Software flaws continue to accumulate rapidly. Fortress Information Security reported a large NVD analysis backlog in 2025, highlighting how difficult it is for defenders to keep up with newly disclosed vulnerabilities.
This growing backlog shows how hard it is to stay ahead of emerging threats. The CVE system helps by giving publicly known vulnerabilities a common identifier. A CVE gives each known security flaw a unique ID and public record. This makes it easier for IT teams, developers, and security pros to track problems and fix them before they are exploited.
Let’s look at what a CVE is, how the CVE system works, and how security teams can use CVE data in vulnerability management.
What Does CVE Stand For
CVE stands for Common Vulnerabilities and Exposures. It is a standardized naming system used to identify and catalog known security flaws in software and hardware.
Each CVE gets a unique ID. The ID uses the format CVE-[YEAR]-[NUMBER]. For example, CVE-2021-44228 refers to a flaw published in 2021. The number does not reflect severity. It is simply a unique identifier. This avoids confusion when referring to a particular vulnerability. The CVE Program is operated by MITRE and sponsored by the U.S. government through DHS and CISA. CVE IDs are assigned by MITRE and by authorized CVE Numbering Authorities, or CNAs.
The purpose of the CVE system is to give security teams, developers, vendors, and IT staff a shared way to identify and discuss known vulnerabilities.
Purpose of the CVE System
The CVE system provides an open and standardized way to track and share information about known security flaws. Without a standard system, security teams, software vendors, and users would have a harder time referring to the same issue and understanding its severity.
The system helps by assigning a unique CVE ID to each vulnerability:
- Avoid confusion when discussing security issues.
- Track known vulnerabilities across different tools and systems.
- Prioritize and remediate vulnerabilities using consistent references.
By using the same references, the CVE system also helps security tools like patch managers and scanners function more efficiently. Additionally, it speeds up communication and helps organizations respond to known flaws before attackers exploit them.
How Are CVEs Created and Numbered
A CVE usually begins when a security flaw is discovered and reported. This could be a regular user, a business, or a security researcher. After the problem has been verified, it is reported to software companies like Microsoft or Google or a reliable group known as a CVE Numbering Authority (CNA), such as MITRE.
After review, the CNA assigns the vulnerability a unique ID. The format of this ID is standard, such as CVE-2025-12345.
Once the CVE is assigned, the record is published so that security teams and vendors can reference it publicly. This helps security teams, vendors, and the wider community understand the issue and take steps to address it.
What Is a CVSS Score
A CVSS score is a numeric rating used to estimate the severity of a security vulnerability. It helps teams understand how serious a vulnerability may be if it remains unpatched. That value is determined by what is known as the Common Vulnerability Scoring System (CVSS) and tends to have a range of scores between 0 and 10.
The score considers how easy the vulnerability is to exploit, whether it can be exploited remotely, and what impact it could have on the affected system.
A critical vulnerability may allow an attacker to gain remote control of an internet-facing system, whereas a low-risk CVE may enable only minor changes when very particular circumstances are met.
A CVSS score helps organizations decide which issues need urgent attention and which can be handled later.
Some Examples of Notable CVEs
Some CVEs have had a major impact on cybersecurity over the years. These examples show how a single widely exposed flaw can cause serious disruption.
Here are a few notable examples:
- CVE-2017-0144 EternalBlue: this was a vulnerability in Microsoft Windows. It was deployed in the WannaCry ransomware attack. The vulnerability contributed to widespread disruption during the WannaCry ransomware outbreak in 2017.
- CVE-2021-44228 Log4Shell: a severe vulnerability of the widely-used Log4j API of the logging software in Java applications. It allowed attackers to gain remote access to vulnerable systems and became one of the most widely discussed vulnerabilities in recent years.
- CVE-2014-0160 Heartbleed: Heartbleed was a vulnerability in OpenSSL that could allow attackers to steal sensitive data, including passwords and encryption keys.
This is why CVE tracking and timely patching matter. An unpatched vulnerability can lead to significant consequences for people and governments.
How Can You Track and Manage CVEs
Monitoring and managing known vulnerabilities is a core part of system security. Fortunately, some tools and resources can keep IT teams and security professionals up to date.
Some common ways to track and manage CVEs include:
- Official sources - the CVE list maintained through the CVE Program and the National Vulnerability Database (NVD) provide public information about known CVEs.
- Security tools - vulnerability scanners and related security tools can scan systems automatically to look for known CVEs.
- Patch management software - these tools help teams identify, deploy, and verify patches for affected systems.
Simplifying CVE Management with TopScan
Managing CVEs across spreadsheets, scanner reports, and disconnected tools quickly becomes difficult for small and mid-sized teams. TopScan brings that process into a single workflow by continuously monitoring your external attack surface, identifying exposed services, tracking vulnerabilities, and enriching findings with CVE and severity context in one dashboard. It is built for teams that need a clear view of what is internet-facing, what changed, and what requires attention first.
Instead of treating every finding the same, TopScan prioritises issues based on real-world context such as exposure and overall risk, helping teams focus on the vulnerabilities that matter most rather than sorting through noisy reports.
Remediation is handled as an ongoing process: findings can be assigned, tracked by status, and managed against SLA deadlines, with notifications and reporting that make follow-up easier for teams without a dedicated security department. This turns CVE management from a fragmented manual task into continuous vulnerability management.
Types of Vulnerabilities Listed in CVEs
CVEs can describe many types of security weaknesses, depending on how the issue affects software, hardware, firmware, or configuration. Understanding common categories helps teams recognize and fix issues faster.
Common examples include:
- Buffer overflows. Sending more data than a program expects can cause crashes or allow an attacker to execute malicious code.
- Code injection. An attacker injects malicious code through user-supplied input to control the application, access data, or change its behavior.
- Privilege escalation. This is a flaw that allows a user or attacker to gain more access than normally permitted.
- Authentication bypass. Weaknesses that allow attackers to bypass login checks or gain unauthorized access without valid credentials.
- Misconfigurations. These include insecure settings that make systems easier to attack.
Each CVE record describes the vulnerability so developers, security teams, and users can understand the issue and decide how to address it.
How Do Hackers Exploit CVEs
Attackers can use automated tools to scan for systems affected by known, unpatched vulnerabilities. These weaknesses are often easy to identify in public vulnerability databases, especially when patches have not been installed.
A typical exploitation path looks like this:
- Attackers use automated tools to find vulnerable systems.
- They launch code or a script designed to exploit the weakness.
- After gaining access, they can steal data, deploy malware, or move deeper into a network.
Only a small share of CVEs are actively exploited by real-world attackers, but some are exploited in the wild before many organizations are aware of them. That is why teams should patch affected systems promptly and monitor CVE reports regularly.
What Should You Do When a New CVE Is Released
It is essential to respond quickly when a new CVE affecting your systems is published. Even if there is no evidence of exploitation yet, the longer remediation is delayed, the higher the risk becomes.
This is what you should do:
- Review the CVE details. Review the description, check the CVSS score, and identify which software versions or systems may be affected.
- Check whether your systems are affected. Identify whether any of your systems use the affected software or version.
- Install patches/updates. Install the vendor patch as soon as possible. If patching is not immediately possible, apply a documented workaround or mitigation.
- Monitor any signs of exploitation. Look for strange behaviour on your system or alerts that could point to a possible attack.
A good vulnerability management process will help you react to the latest CVEs promptly and protect your data and systems.
How Often Are New CVEs Released
New CVEs are published almost every day. As software ecosystems grow and change, security teams and researchers continue to find new vulnerabilities. Thousands of CVEs are added to public databases every year.
Because new CVEs are published continuously, organizations need a reliable way to track them. These sources are relatively easy to monitor using automated tools that alert teams to newly disclosed issues.
Monitoring new CVEs helps organizations respond faster and reduce the chance of a breach.
CVE Governance & Programs
The CVE Program is operated by MITRE and sponsored by the U.S. Cybersecurity and Infrastructure Security Agency, or CISA. CVE.org is the official public website of the CVE Program maintained by MITRE.
MITRE also plays a central role in the CNA ecosystem that assigns CVE IDs. These organizations are authorized to assign CVE IDs to vulnerabilities they discover or receive reports about.
The National Institute of Standards and Technology NIST supports the ecosystem through the National Vulnerability Database (NVD), which enriches CVE records with severity scoring and technical analysis.
Final Thoughts
Common Vulnerabilities and Exposures are an essential part of how the security community tracks and communicates known flaws. They provide a standardized way to report, track, and discuss security issues across products and systems.
By using the CVE system, security teams, organizations, and developers can identify known vulnerabilities more consistently and understand their severity. This helps them respond more consistently and reduce the risk created by known, unpatched vulnerabilities.
