| 156395 | openSUSE 15 Security Update : MozillaThunderbird (openSUSE-SU-2021:1635-1) | Nessus | SuSE Local Security Checks | 2021/12/30 | 2025/3/6 | critical |
| 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 |
| 174073 | NewStart CGSL CORE 5.05 / MAIN 5.05 : firefox Multiple Vulnerabilities (NS-SA-2023-0009) | Nessus | NewStart CGSL Local Security Checks | 2023/4/11 | 2023/4/18 | critical |
| 153925 | Ubuntu 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-5107-1) | Nessus | Ubuntu Local Security Checks | 2021/10/7 | 2024/8/27 | critical |
| 154058 | Mozilla Thunderbird < 91.2 | Nessus | MacOS X Local Security Checks | 2021/10/13 | 2025/11/18 | critical |
| 154135 | RHEL 8 : thunderbird (RHSA-2021:3838) | Nessus | Red Hat Local Security Checks | 2021/10/14 | 2024/11/7 | critical |
| 154193 | openSUSE 15 Security Update : MozillaFirefox (openSUSE-SU-2021:3451-1) | Nessus | SuSE Local Security Checks | 2021/10/17 | 2025/3/6 | critical |
| 154341 | Oracle Linux 7 : firefox (ELSA-2021-3791) | Nessus | Oracle Linux Local Security Checks | 2021/10/22 | 2024/10/22 | critical |
| 155551 | CentOS 7 : firefox (RHSA-2021:3791) | Nessus | CentOS Local Security Checks | 2021/11/17 | 2024/10/9 | critical |
| 245913 | Linux Distros Unpatched Vulnerability : CVE-2021-38501 | Nessus | Misc. | 2025/8/8 | 2026/7/24 | high |
| 153878 | Mozilla Firefox ESR < 91.2 | Nessus | Windows | 2021/10/5 | 2025/11/18 | critical |
| 294640 | MiracleLinux 8 : thunderbird-91.2.0-1.el8.ML.1 (AXSA:2021-2482:19) | Nessus | Miracle Linux Local Security Checks | 2026/1/20 | 2026/1/20 | critical |
| 359019 | Rocky Linux 8 [CIQ] Security Update: thunderbird / thunderbird-debuginfo / thunderbird-debugsource Multiple Vulnerabilities (crlsa-2021_3838) | Nessus | Rocky Linux Local Security Checks | 2026/10/1 | 2026/10/1 | critical |
| 154023 | RHEL 8 : firefox (RHSA-2021:3756) | Nessus | Red Hat Local Security Checks | 2021/10/12 | 2024/11/7 | critical |
| 154134 | RHEL 7 : thunderbird (RHSA-2021:3841) | Nessus | Red Hat Local Security Checks | 2021/10/14 | 2024/11/7 | critical |
| 154202 | Scientific Linux Security Update : firefox on SL7.x i686/x86_64 (2021:3791) | Nessus | Scientific Linux Local Security Checks | 2021/10/18 | 2022/5/9 | critical |
| 154212 | SUSE SLES11: MozillaFirefox / MozillaFirefox-branding-SLED / etc (SUSE-SU-2021:14826-1) | Nessus | SuSE Local Security Checks | 2021/10/19 | 2026/6/25 | critical |
| 153880 | Mozilla Firefox < 93.0 | Nessus | MacOS X Local Security Checks | 2021/10/5 | 2025/12/18 | critical |
| 157783 | Rocky Linux 8 : firefox (RLSA-2021:3755) | Nessus | Rocky Linux Local Security Checks | 2022/2/9 | 2023/11/6 | 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 |
| 156561 | Ubuntu 21.10 : Thunderbird vulnerabilities (USN-5132-1) | Nessus | Ubuntu Local Security Checks | 2022/1/7 | 2024/8/28 | critical |
| 291431 | MiracleLinux 7 : firefox-91.2.0-5.0.1.el7.AXS7 (AXBA:2021-2506:30) | Nessus | Miracle Linux Local Security Checks | 2026/1/19 | 2026/1/19 | critical |
| 357760 | Rocky Linux 8 [CIQ] Security Update: firefox / firefox-debuginfo / firefox-debugsource Multiple Vulnerabilities (crlsa-2021_3755) | Nessus | Rocky Linux Local Security Checks | 2026/10/1 | 2026/10/1 | critical |
