| 154886 | Oracle Linux 7 : firefox (ELSA-2021-4116) | Nessus | Oracle Linux Local Security Checks | 2021/11/4 | 2024/10/22 | critical |
| 154979 | CentOS 8 : thunderbird (CESA-2021:4130) | Nessus | CentOS Local Security Checks | 2021/11/9 | 2022/3/17 | critical |
| 155157 | SUSE SLES15: MozillaFirefox / MozillaFirefox-devel / etc (SUSE-SU-2021:3651-1) | Nessus | SuSE Local Security Checks | 2021/11/11 | 2026/6/26 | critical |
| 155637 | Ubuntu 21.10 : Thunderbird vulnerabilities (USN-5152-1) | Nessus | Ubuntu Local Security Checks | 2021/11/19 | 2024/8/28 | critical |
| 155644 | SUSE SLED15: MozillaFirefox / MozillaFirefox-devel / etc (SUSE-SU-2021:3745-1) | Nessus | SuSE Local Security Checks | 2021/11/20 | 2026/6/25 | critical |
| 156271 | openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:4150-1) | Nessus | SuSE Local Security Checks | 2021/12/25 | 2025/3/6 | critical |
| 156292 | SUSE SLED15: MozillaThunderbird / MozillaThunderbird-translations-common / etc (SUSE-SU-2021:4150-1) | Nessus | SuSE Local Security Checks | 2021/12/25 | 2026/6/26 | critical |
| 159007 | GLSA-202202-03 : Mozilla Firefox: Multiple vulnerabilities | Nessus | Gentoo Local Security Checks | 2022/3/17 | 2025/3/6 | critical |
| 294633 | MiracleLinux 8 : thunderbird-91.3.0-2.el8.ML.1 (AXSA:2021-2532:20) | Nessus | Miracle Linux Local Security Checks | 2026/1/20 | 2026/1/20 | critical |
| 155539 | CentOS 7 : firefox (RHSA-2021:4116) | Nessus | CentOS Local Security Checks | 2021/11/17 | 2024/10/9 | critical |
| 155575 | SUSE SLED12: MozillaFirefox / MozillaFirefox-devel / etc (SUSE-SU-2021:3721-1) | Nessus | SuSE Local Security Checks | 2021/11/18 | 2026/6/26 | critical |
| 155656 | openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3745-1) | Nessus | SuSE Local Security Checks | 2021/11/20 | 2022/3/17 | critical |
| 156385 | Debian DLA-2863-1 : firefox-esr - LTS security update | Nessus | Debian Local Security Checks | 2021/12/29 | 2025/1/24 | critical |
| 156395 | openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1635-1) | Nessus | SuSE Local Security Checks | 2021/12/30 | 2025/3/6 | critical |
| 154875 | Mozilla Thunderbird < 91.3 | Nessus | Windows | 2021/11/3 | 2025/11/18 | critical |
| 154883 | Ubuntu 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-5131-1) | Nessus | Ubuntu Local Security Checks | 2021/11/3 | 2024/8/28 | critical |
| 154902 | Oracle Linux 7 : thunderbird (ELSA-2021-4134) | Nessus | Oracle Linux Local Security Checks | 2021/11/5 | 2024/10/22 | critical |
| 154905 | Oracle Linux 8 : firefox (ELSA-2021-4123) | Nessus | Oracle Linux Local Security Checks | 2021/11/5 | 2024/10/22 | critical |
| 154934 | Oracle Linux 8 : thunderbird (ELSA-2021-4130) | Nessus | Oracle Linux Local Security Checks | 2021/11/5 | 2024/10/22 | critical |
| 154942 | RHEL 8 : thunderbird (RHSA-2021:4133) | Nessus | Red Hat Local Security Checks | 2021/11/6 | 2024/11/7 | critical |
| 155023 | RHEL 8 : firefox (RHSA-2021:4605) | Nessus | Red Hat Local Security Checks | 2021/11/10 | 2024/11/8 | critical |
| 247882 | Linux Distros Unpatched Vulnerability : CVE-2021-38509 | Nessus | Misc. | 2025/8/11 | 2026/7/24 | medium |
| 156961 | Ubuntu 18.04 LTS / 20.04 LTS : Thunderbird vulnerabilities (USN-5248-1) | Nessus | Ubuntu Local Security Checks | 2022/1/22 | 2025/3/6 | critical |
| 163986 | GLSA-202208-14 : Mozilla Thunderbird: Multiple Vulnerabilities | Nessus | Gentoo Local Security Checks | 2022/8/10 | 2023/10/16 | critical |
| 154817 | Mozilla Firefox ESR < 91.3 | Nessus | Windows | 2021/11/2 | 2025/11/18 | critical |
| 154820 | Mozilla Firefox < 94.0 | Nessus | MacOS X Local Security Checks | 2021/11/2 | 2025/11/18 | critical |
| 154944 | RHEL 8 : thunderbird (RHSA-2021:4130) | Nessus | Red Hat Local Security Checks | 2021/11/6 | 2024/11/7 | critical |
| 154947 | RHEL 8 : thunderbird (RHSA-2021:4132) | Nessus | Red Hat Local Security Checks | 2021/11/6 | 2024/11/7 | critical |
| 157643 | AlmaLinux 8 : thunderbird (ALSA-2021:4130) | Nessus | Alma Linux Local Security Checks | 2022/2/9 | 2022/3/17 | critical |
| 358302 | Rocky Linux 8 [CIQ] Security Update: thunderbird / thunderbird-debuginfo / thunderbird-debugsource Multiple Vulnerabilities (crlsa-2021_4130) | Nessus | Rocky Linux Local Security Checks | 2026/10/1 | 2026/10/1 | critical |
| 358821 | Rocky Linux 8 [CIQ] Security Update: firefox / firefox-debuginfo / firefox-debugsource Multiple Vulnerabilities (crlsa-2021_4123) | Nessus | Rocky Linux Local Security Checks | 2026/10/1 | 2026/10/1 | critical |
| 206859 | NewStart CGSL MAIN 6.02 : firefox Multiple Vulnerabilities (NS-SA-2024-0066) | Nessus | NewStart CGSL Local Security Checks | 2024/9/10 | 2025/9/25 | critical |
