CVE
Common Vulnerabilities and Exposures
A common identification number assigned to a vulnerability found in a product or system.
In Simple Terms
CVE is a globally shared reference number assigned to a security hole found in software. Experts around the world use a standardized number like "CVE-2026-12345" to precisely share which flaw they're talking about. This means the same vulnerability information can be checked without confusion across different security tools and news reports.
Behind the Name
CVE stands for Common Vulnerabilities and Exposures. "Common" means shared, "Vulnerabilities" refers to security flaws, and "Exposures" refers to configurations or states that could give attackers a foothold. Publicly disclosed vulnerabilities are assigned a CVE ID for identification and tracking, reflecting CVE's role as a shared system for cataloging security flaws.
Take a Closer Look!
CVE is a globally shared identification number assigned to a vulnerability — a security flaw that exists in software or a system.
Put simply, it's a "reference number" that lets security professionals around the world talk about the same flaw.
It's managed primarily by MITRE, a U.S. nonprofit organization, and a large number of vulnerabilities are assigned numbers every year.
When a flaw is found in an app or an OS, if each development company or research team calls it by a different name, it becomes impossible to tell whether everyone's talking about the same issue or a different one.
That's why a fixed format — "CVE-year-sequence number" — was established: when a CVE ID is assigned, it uniquely identifies that one flaw.
Thanks to this, news outlets and security tools around the world can reference the same CVE number for a given flaw, avoiding confusion.
Security teams check daily whether CVE IDs have been issued for vulnerabilities affecting the systems they use, and decide whether to apply a fix based on that.
There are also systems built around CVE data that score how severe a flaw is, making it a widely used foundation for security work.