| 148989 | RHEL 8 : firefox (RHSA-2021:1361) | Nessus | Red Hat Local Security Checks | 2021/4/26 | 2024/11/8 | high |
| 148992 | Ubuntu 16.04 LTS / 18.04 LTS / 20.04 LTS : Firefox vulnerabilities (USN-4926-1) | Nessus | Ubuntu Local Security Checks | 2021/4/26 | 2024/8/28 | high |
| 149035 | SUSE SLES12 Security Update : MozillaFirefox (SUSE-SU-2021:1325-1) | Nessus | SuSE Local Security Checks | 2021/4/28 | 2024/1/3 | high |
| 150617 | SUSE SLES11 Security Update : MozillaFirefox (SUSE-SU-2021:14708-1) | Nessus | SuSE Local Security Checks | 2021/6/10 | 2023/12/26 | high |
| 154502 | NewStart CGSL MAIN 6.02 : firefox Multiple Vulnerabilities (NS-SA-2021-0131) | Nessus | NewStart CGSL Local Security Checks | 2021/10/27 | 2023/11/27 | high |
| 148964 | Debian DSA-4897-1 : thunderbird - security update | Nessus | Debian Local Security Checks | 2021/4/23 | 2024/1/12 | high |
| 148932 | Debian DSA-4895-1 : firefox-esr - security update | Nessus | Debian Local Security Checks | 2021/4/22 | 2024/1/12 | high |
| 148993 | RHEL 8 : firefox (RHSA-2021:1360) | Nessus | Red Hat Local Security Checks | 2021/4/26 | 2024/11/7 | high |
| 148998 | Oracle Linux 7 : thunderbird (ELSA-2021-1350) | Nessus | Oracle Linux Local Security Checks | 2021/4/27 | 2024/10/23 | high |
| 149554 | openSUSE Security Update : MozillaFirefox (openSUSE-2021-621) | Nessus | SuSE Local Security Checks | 2021/5/18 | 2024/1/1 | high |
| 247845 | Linux Distros Unpatched Vulnerability : CVE-2021-23995 | Nessus | Misc. | 2025/8/11 | 2025/8/11 | high |
| 150949 | Ubuntu 20.04 LTS : Thunderbird vulnerabilities (USN-4995-1) | Nessus | Ubuntu Local Security Checks | 2021/6/22 | 2024/8/27 | high |
| 151017 | Ubuntu 18.04 LTS : Thunderbird vulnerabilities (USN-4995-2) | Nessus | Ubuntu Local Security Checks | 2021/6/25 | 2024/10/29 | high |
| 148766 | Mozilla Firefox < 88.0 | Nessus | MacOS X Local Security Checks | 2021/4/19 | 2025/11/18 | high |
| 148983 | RHEL 8 : thunderbird (RHSA-2021:1352) | Nessus | Red Hat Local Security Checks | 2021/4/26 | 2024/11/7 | high |
| 148985 | RHEL 8 : thunderbird (RHSA-2021:1351) | Nessus | Red Hat Local Security Checks | 2021/4/26 | 2024/11/7 | high |
| 148990 | RHEL 7 : firefox (RHSA-2021:1363) | Nessus | Red Hat Local Security Checks | 2021/4/26 | 2024/11/7 | high |
| 148999 | Oracle Linux 8 : firefox (ELSA-2021-1360) | Nessus | Oracle Linux Local Security Checks | 2021/4/27 | 2024/10/23 | high |
| 294406 | MiracleLinux 4 : thunderbird-78.10.0-1.0.1.AXS4 (AXSA:2021-1718:08) | Nessus | Miracle Linux Local Security Checks | 2026/1/20 | 2026/1/20 | high |
