The CVE-2021 list

22,611 CVE-2021 records, searchable in one list

The year in a CVE identifier is usually the year the CVE Program assigned it, so CVE-2021 records kept appearing after 2021 ended. Search them by number, vendor or product, filter by severity and signal, and open each one on cve-security.com for its sources, detection content and remediation. The signals include a listing in the Cybersecurity and Infrastructure Security Agency's Known Exploited Vulnerabilities (KEV) catalog and the Exploit Prediction Scoring System (EPSS) score, where a record carries one.

By publication month

CVE-2021 records by the month each record was published. CVE Numbering Authorities still publish records under identifiers assigned in 2021, and the 6,408 published since then sit together under After 2021. Each page lists its records and the share that carry a detection signal, exploit code or an actionable vendor fix.

Published after 2021

  1. After 20216,408

CISA KEV listings by month

The 216 CVE-2021 records CISA has added to the KEV catalog, counted by the month CISA listed each one. Every date on this chart is the CISA listing date, which can fall weeks or months after the record was published. The last column holds the 96 listings CISA has made since 2021 ended.

CISA listing month
Table view
CVE-2021 records CISA added to the KEV catalog, by CISA listing month
CISA listing monthListings
January 20210
February 20210
March 20210
April 20210
May 20210
June 20210
July 20210
August 20210
September 20210
October 20210
November 2021111
December 20219
After 202196

Vendors

Most CVE-2021 records in CISA KEV

Counted by the vendor label CISA gives each KEV entry, which can name a company or a platform. Vendors tied at the cutoff share the last row.

#CISA vendor labelKEV-listed
1Microsoft49
2Apple22
3Google19
4Samsung9
5SonicWall7
6VMware6
7Apache5
7Ivanti5
9Accellion4
9Arm4
9Zoho4

Most CVE-2021 records

Counted by the vendors each record names in its product data. The counts follow how vendors and CVE Numbering Authorities publish and how products are mapped, so they say nothing about how secure one vendor is compared with another. A record that names two vendors counts for each.

#VendorRecords
1Google1,426
2Fedoraproject1,108
3Debian951
4Microsoft938
5Linux926
6Oracle858
7Cisco613
8IBM554
9Adobe541
10Netapp523

Vendor names lead to their pages on cve-security.com, which cover CVEs from every year.

Weakness classes

The 10 Common Weakness Enumeration (CWE) classes named by the most CVE-2021 records. 19,322 of the 22,611 records name at least one class, and a record can name several, so the rows overlap.

CWEWeaknessRecordsShare
CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')2,81112.4%
CWE-787Out-of-bounds Write1,6667.4%
CWE-125Out-of-bounds Read8243.6%
CWE-20Improper Input Validation8183.6%
CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')7983.5%
CWE-416Use After Free7923.5%
CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')5862.6%
CWE-476NULL Pointer Dereference5652.5%
CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')5172.3%
CWE-352Cross-Site Request Forgery (CSRF)5122.3%

What the list holds

Records
Each row is a CVE-2021 identifier with a published record in the cve-security.com dataset, which reads the CVE Program's records and NVD. The 868 identifiers the CVE Program has rejected stay off the list; opening one on cve-security.com shows the rejection.
CVSS
The score is the primary CVSS assessment cve-security.com shows for the CVE. Beneath it sit the scorer (NVD, the CVE Numbering Authority that published the record, or CISA's Authorized Data Publisher enrichment) and the CVSS version. A record without an assessment shows no score.
EPSS
The estimate FIRST.org publishes of the probability that exploitation activity against the CVE is observed in the next 30 days, refreshed daily.
Exploitation
KEV marks a CVE that CISA lists as confirmed exploited. Reported exploited marks a CVE that another tracker reports as exploited while it remains outside CISA KEV, as KEV Watch™ lists it; the CVE page names the tracker and links its report.
Detection
A detection signal is public detection content this dataset holds: a Nuclei template, a Metasploit check module, an Emerging Threats rule or a Snort rule that works over the network. It says the content exists, and a given product or environment may still miss the exploitation.
Exploit code
A Metasploit exploit module, an Exploit-DB entry or a public proof-of-concept repository that this dataset holds. Exploit code shows that an attack can be built and reports no attack on its own.
Vendor fix
An actionable vendor fix is a fixed version or a vendor advisory this dataset holds. The remediation panel on the CVE page says which affected products it covers.
Rankings
The KEV vendor list counts the vendor label CISA gives each KEV entry. The record list counts the vendors named in each record's product data, and the weakness table the CWE classes each record names. Each figure comes from one of these sources, and no figure adds them together.
Data access
Each record's full detail is in the API and nightly download on cve-security.com, which take a free key.
Freshness
The list rebuilds each night from the cve-security.com dataset, which refreshes hourly, so the CVE page carries the current record.