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December 2021

Vulnerabilities first published in this month (UTC), newest first.

← November 2021 2021 / December January 2022 →
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  3. 331
  4. 41
  5. 57
  6. 655
  7. 7135
  8. 8138
  9. 954
  10. 1033
  11. 112
  12. 123
  13. 13108
  14. 14116
  15. 15255
  16. 1644
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  18. 183
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  20. 2073
  21. 2166
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All Critical High Medium Low Exploited only Public exploit

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  • High 8.1
    CVE-2021-44207 Exploited EPSS 17%

    Acclaim USAHERDS through 7.4.0.1 uses hard-coded credentials.

    KEV Dec 23, 2024
  • High 7.5
    CVE-2021-22054 Exploited Public exploit EPSS 100%

    VMware Workspace ONE UEM console 20.0.8 prior to 20.0.8.37, 20.11.0 prior to 20.11.0.40, 21.2.0 prior to 21.2.0.27, and…

    KEV Mar 9, 2026
  • High 7.8
    CVE-2021-1048 Exploited

    In ep_loop_check_proc of eventpoll.c, there is a possible way to corrupt memory due to a use after free. This could lea…

    linux-raspi2 linux-hwe linux-azure linux-riscv Android Debian Ubuntu
    KEV May 23, 2022
  • High 7.1
    CVE-2021-43890 Exploited · Ransomware EPSS 11%

    Windows AppX Installer Spoofing Vulnerability

    We have investigated reports of a spoofing vulnerability in AppX installer that affects Microsoft Windows. Microsoft is aware of attacks that attempt to exploit this vulnerability by using specially crafted packages that include the malware family known as Em…

    Microsoft App Installer
    KEV Dec 15, 2021
  • High 7.8
    CVE-2021-43226 Exploited · Ransomware Public exploit

    Windows Common Log File System Driver Elevation of Privilege Vulnerability

    Windows Common Log File System Driver Elevation of Privilege Vulnerability

    Microsoft Windows Server 2019 Windows Server 2019 (Server Core installation) Windows 10 Version 1809 Windows
    KEV Oct 6, 2025
  • High 7.5
    CVE-2021-43798 Exploited Public exploit EPSS 89%

    Grafana path traversal

    Grafana is an open-source platform for monitoring and observability. Grafana versions 8.0.0-beta1 through 8.3.0 (except for patched versions) iss vulnerable to directory traversal, allowing access to local files. The vulnerable URL path is: `<grafana_host_url…

    Grafana Grafana github.com/grafana/grafana grafana Web / CMS Alpine Go
    KEV Oct 9, 2025
  • High 8.1
    CVE-2021-23758 Exploited Public exploit EPSS 83%

    Deserialization of Untrusted Data

    All versions of package ajaxpro.2 are vulnerable to Deserialization of Untrusted Data due to the possibility of deserialization of arbitrary .NET classes, which can be abused to gain remote code execution.

    AjaxNetProfessional NuGet
    KEV Aug 26, 2026