CVE-2021 records published in December 2021

This page lists the 1,836 CVE-2021 records published in December 2021, newest first, 1,000 to a page. The Cybersecurity and Infrastructure Security Agency's Known Exploited Vulnerabilities (KEV) catalog lists 15 of them. Each CVE opens on cve-security.com with its sources, detection content and vendor fixes, and the search on the CVE-2021 list filters these records by severity or signal.

Critical

30816.8% of these records

Listed in CISA KEV

150.8% of these records

Reported exploited

10.1% of these records

Detection signal

532.9% of these records

Exploit code

613.3% of these records

Actionable vendor fix

1,46179.6% of these records

Figures as of 2026-10-24 13:51 UTC. Records published in December 2021 have had from about 58 months to about 59 months to collect KEV listings, exploitation reports, detection content and exploit code. Records published more recently have had less time, which can hold their shares down.