| 148985 | RHEL 8 : thunderbird (RHSA-2021:1351) | Nessus | Red Hat Local Security Checks | 4/26/2021 | 11/7/2024 | high |
| 148999 | Oracle Linux 8 : firefox (ELSA-2021-1360) | Nessus | Oracle Linux Local Security Checks | 4/27/2021 | 10/23/2024 | high |
| 294406 | MiracleLinux 4 : thunderbird-78.10.0-1.0.1.AXS4 (AXSA:2021-1718:08) | Nessus | Miracle Linux Local Security Checks | 1/20/2026 | 1/20/2026 | high |
| 148983 | RHEL 8 : thunderbird (RHSA-2021:1352) | Nessus | Red Hat Local Security Checks | 4/26/2021 | 11/7/2024 | high |
| 148990 | RHEL 7 : firefox (RHSA-2021:1363) | Nessus | Red Hat Local Security Checks | 4/26/2021 | 11/7/2024 | high |
| 148932 | Debian DSA-4895-1 : firefox-esr - security update | Nessus | Debian Local Security Checks | 4/22/2021 | 1/12/2024 | high |
| 150949 | Ubuntu 20.04 LTS : Thunderbird vulnerabilities (USN-4995-1) | Nessus | Ubuntu Local Security Checks | 6/22/2021 | 8/27/2024 | high |
| 151017 | Ubuntu 18.04 LTS : Thunderbird vulnerabilities (USN-4995-2) | Nessus | Ubuntu Local Security Checks | 6/25/2021 | 10/29/2024 | high |
| 148993 | RHEL 8 : firefox (RHSA-2021:1360) | Nessus | Red Hat Local Security Checks | 4/26/2021 | 11/7/2024 | high |
| 148998 | Oracle Linux 7 : thunderbird (ELSA-2021-1350) | Nessus | Oracle Linux Local Security Checks | 4/27/2021 | 10/23/2024 | high |
| 149554 | openSUSE Security Update : MozillaFirefox (openSUSE-2021-621) | Nessus | SuSE Local Security Checks | 5/18/2021 | 1/1/2024 | high |
| 246503 | Linux Distros Unpatched Vulnerability : CVE-2021-23994 | Nessus | Misc. | 8/9/2025 | 7/24/2026 | high |
| 148767 | Mozilla Firefox < 88.0 | Nessus | Windows | 4/19/2021 | 11/18/2025 | high |
| 148773 | Mozilla Thunderbird < 78.10 | Nessus | Windows | 4/19/2021 | 11/18/2025 | high |
| 148775 | Mozilla Firefox ESR < 78.10 | Nessus | Windows | 4/19/2021 | 11/18/2025 | high |
| 148988 | RHEL 8 : firefox (RHSA-2021:1362) | Nessus | Red Hat Local Security Checks | 4/26/2021 | 11/7/2024 | high |
| 208520 | CentOS 7 : firefox (RHSA-2021:1363) | Nessus | CentOS Local Security Checks | 10/9/2024 | 10/9/2024 | high |
| 208530 | CentOS 7 : thunderbird (RHSA-2021:1350) | Nessus | CentOS Local Security Checks | 10/9/2024 | 10/9/2024 | high |
| 294429 | MiracleLinux 4 : firefox-78.10.0-1.0.1.AXS4 (AXSA:2021-1731:12) | Nessus | Miracle Linux Local Security Checks | 1/20/2026 | 1/20/2026 | high |
| 148965 | Debian DLA-2632-1 : thunderbird security update | Nessus | Debian Local Security Checks | 4/23/2021 | 1/12/2024 | high |
| 149233 | GLSA-202104-10 : Mozilla Firefox: Multiple vulnerabilities | Nessus | Gentoo Local Security Checks | 5/3/2021 | 1/12/2024 | high |
| 294525 | MiracleLinux 8 : firefox-78.10.0-1.0.1.el8 (AXSA:2021-1733:13) | Nessus | Miracle Linux Local Security Checks | 1/20/2026 | 1/20/2026 | high |
| 149006 | SUSE SLED15 / SLES15 Security Update : MozillaFirefox (SUSE-SU-2021:1307-1) | Nessus | SuSE Local Security Checks | 4/27/2021 | 1/3/2024 | high |
| 149008 | Debian DLA-2633-1 : firefox-esr security update | Nessus | Debian Local Security Checks | 4/27/2021 | 1/12/2024 | high |
| 149021 | Oracle Linux 8 : thunderbird (ELSA-2021-1353) | Nessus | Oracle Linux Local Security Checks | 4/27/2021 | 10/23/2024 | high |
| 149237 | CentOS 8 : firefox (CESA-2021:1360) | Nessus | CentOS Local Security Checks | 5/3/2021 | 1/2/2024 | high |
| 154623 | NewStart CGSL CORE 5.04 / MAIN 5.04 : firefox Multiple Vulnerabilities (NS-SA-2021-0107) | Nessus | NewStart CGSL Local Security Checks | 10/28/2021 | 11/27/2023 | high |
