| 154979 | CentOS 8 : thunderbird (CESA-2021:4130) | Nessus | CentOS Local Security Checks | 11/9/2021 | 3/17/2022 | critical |
| 155157 | SUSE SLES15: MozillaFirefox / MozillaFirefox-devel / etc (SUSE-SU-2021:3651-1) | Nessus | SuSE Local Security Checks | 11/11/2021 | 6/26/2026 | critical |
| 294633 | MiracleLinux 8 : thunderbird-91.3.0-2.el8.ML.1 (AXSA:2021-2532:20) | Nessus | Miracle Linux Local Security Checks | 1/20/2026 | 1/20/2026 | critical |
| 154875 | Mozilla Thunderbird < 91.3 | Nessus | Windows | 11/3/2021 | 11/18/2025 | critical |
| 154905 | Oracle Linux 8 : firefox (ELSA-2021-4123) | Nessus | Oracle Linux Local Security Checks | 11/5/2021 | 10/22/2024 | critical |
| 154942 | RHEL 8 : thunderbird (RHSA-2021:4133) | Nessus | Red Hat Local Security Checks | 11/6/2021 | 11/7/2024 | critical |
| 155539 | CentOS 7 : firefox (RHSA-2021:4116) | Nessus | CentOS Local Security Checks | 11/17/2021 | 10/9/2024 | critical |
| 154883 | Ubuntu 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-5131-1) | Nessus | Ubuntu Local Security Checks | 11/3/2021 | 8/28/2024 | critical |
| 154902 | Oracle Linux 7 : thunderbird (ELSA-2021-4134) | Nessus | Oracle Linux Local Security Checks | 11/5/2021 | 10/22/2024 | critical |
| 154934 | Oracle Linux 8 : thunderbird (ELSA-2021-4130) | Nessus | Oracle Linux Local Security Checks | 11/5/2021 | 10/22/2024 | critical |
| 155023 | RHEL 8 : firefox (RHSA-2021:4605) | Nessus | Red Hat Local Security Checks | 11/10/2021 | 11/8/2024 | critical |
| 155575 | SUSE SLED12: MozillaFirefox / MozillaFirefox-devel / etc (SUSE-SU-2021:3721-1) | Nessus | SuSE Local Security Checks | 11/18/2021 | 6/26/2026 | critical |
| 155656 | openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3745-1) | Nessus | SuSE Local Security Checks | 11/20/2021 | 3/17/2022 | critical |
| 156385 | Debian DLA-2863-1 : firefox-esr - LTS security update | Nessus | Debian Local Security Checks | 12/29/2021 | 1/24/2025 | critical |
| 156395 | openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1635-1) | Nessus | SuSE Local Security Checks | 12/30/2021 | 3/6/2025 | critical |
| 156961 | Ubuntu 18.04 LTS / 20.04 LTS : Thunderbird vulnerabilities (USN-5248-1) | Nessus | Ubuntu Local Security Checks | 1/22/2022 | 3/6/2025 | critical |
| 163986 | GLSA-202208-14 : Mozilla Thunderbird: Multiple Vulnerabilities | Nessus | Gentoo Local Security Checks | 8/10/2022 | 10/16/2023 | critical |
| 154876 | Mozilla Thunderbird < 91.3 | Nessus | MacOS X Local Security Checks | 11/3/2021 | 11/18/2025 | critical |
| 294180 | MiracleLinux 8 : firefox-91.3.0-1.el8.ML.1 (AXSA:2021-2529:31) | Nessus | Miracle Linux Local Security Checks | 1/20/2026 | 1/20/2026 | critical |
| 154891 | RHEL 7 : firefox (RHSA-2021:4116) | Nessus | Red Hat Local Security Checks | 11/4/2021 | 11/7/2024 | critical |
| 154909 | RHEL 8 : firefox (RHSA-2021:4123) | Nessus | Red Hat Local Security Checks | 11/5/2021 | 11/7/2024 | critical |
| 154943 | RHEL 7 : thunderbird (RHSA-2021:4134) | Nessus | Red Hat Local Security Checks | 11/6/2021 | 11/7/2024 | critical |
| 156191 | Debian DSA-5026-1 : firefox-esr - security update | Nessus | Debian Local Security Checks | 12/19/2021 | 1/24/2025 | critical |
| 156457 | Debian DLA-2874-1 : thunderbird - LTS security update | Nessus | Debian Local Security Checks | 1/4/2022 | 5/6/2022 | critical |
