Mozilla
4,060 CVEs across 209 months on the top 200 list since Jul 2000. Peak rank #1 in 5 months, last Nov 2012. 13 of them are now in CISA KEV.
Mozilla CVEs per month since Jul 2000
Dec 2021: 28 CVEs · 2 critical · 0 now in CISA KEV · rank #23 · mostly Firefox, Thunderbird, Firefox EsrJan 2022: below the top 200 that month, 2 or fewer CVEsFeb 2022: below the top 200 that month, 2 or fewer CVEsMar 2022: below the top 200 that month, 3 or fewer CVEsApr 2022: below the top 200 that month, 3 or fewer CVEsMay 2022: 4 CVEs · 0 critical · 0 now in CISA KEV · rank #148 · mostly Convict, Hawk, GeckodriverJun 2022: below the top 200 that month, 3 or fewer CVEsJul 2022: below the top 200 that month, 3 or fewer CVEsAug 2022: below the top 200 that month, 3 or fewer CVEsSep 2022: below the top 200 that month, 3 or fewer CVEsOct 2022: below the top 200 that month, 2 or fewer CVEsNov 2022: below the top 200 that month, 3 or fewer CVEsDec 2022: 175 CVEs · 18 critical · 2 now in CISA KEV · rank #4 · mostly Firefox, Thunderbird, Firefox EsrJan 2023: below the top 200 that month, 3 or fewer CVEsFeb 2023: 7 CVEs · 1 critical · 0 now in CISA KEV · rank #93 · mostly Bleach, Firefox, Mozilla BleachMar 2023: no snapshot, the run for this month failedApr 2023: below the top 200 that month, 3 or fewer CVEsMay 2023: below the top 200 that month, 3 or fewer CVEsJun 2023: 87 CVEs · 8 critical · 0 now in CISA KEV · rank #7 · mostly Firefox, Firefox Esr, ThunderbirdJul 2023: 17 CVEs · 0 critical · 0 now in CISA KEV · rank #50 · mostly Firefox, Thunderbird, Firefox EsrAug 2023: 15 CVEs · 3 critical · 0 now in CISA KEV · rank #63 · mostly Firefox, Firefox Esr, ThunderbirdSep 2023: 25 CVEs · 5 critical · 2 now in CISA KEV · rank #37 · mostly Firefox, Firefox Esr, ThunderbirdOct 2023: 14 CVEs · 2 critical · 0 now in CISA KEV · rank #52 · mostly Firefox, Thunderbird, Firefox EsrNov 2023: 12 CVEs · 1 critical · 0 now in CISA KEV · rank #57 · mostly Firefox, Firefox Esr, ThunderbirdDec 2023: 22 CVEs · 0 critical · 0 now in CISA KEV · rank #40 · mostly Firefox, Thunderbird, Firefox EsrJan 2024: 17 CVEs · 0 critical · 0 now in CISA KEV · rank #53 · mostly Firefox, Thunderbird, Firefox EsrFeb 2024: 18 CVEs · 1 critical · 0 now in CISA KEV · rank #46 · mostly Firefox, Thunderbird, Firefox EsrMar 2024: 16 CVEs · 2 critical · 0 now in CISA KEV · rank #48 · mostly Firefox, Firefox Esr, ThunderbirdApr 2024: 17 CVEs · 1 critical · 0 now in CISA KEV · rank #53 · mostly Firefox, Thunderbird, Firefox EsrMay 2024: 17 CVEs · 2 critical · 0 now in CISA KEV · rank #74 · mostly Firefox, Firefox Esr, ThunderbirdJun 2024: 18 CVEs · 3 critical · 0 now in CISA KEV · rank #36 · mostly Firefox, Firefox Esr, ThunderbirdJul 2024: 16 CVEs · 2 critical · 0 now in CISA KEV · rank #48 · mostly Firefox, Thunderbird, Firefox EsrAug 2024: 18 CVEs · 2 critical · 0 now in CISA KEV · rank #47 · mostly Firefox, Firefox Esr, ThunderbirdSep 2024: 14 CVEs · 5 critical · 0 now in CISA KEV · rank #50 · mostly Firefox, Thunderbird, Firefox EsrOct 2024: 28 CVEs · 5 critical · 1 now in CISA KEV · rank #31 · mostly Firefox, Thunderbird, Firefox EsrNov 2024: 24 CVEs · 4 critical · 0 now in CISA KEV · rank #41 · mostly Firefox, Thunderbird, Firefox EsrDec 2024: below the top 200 that month, 3 or fewer CVEsJan 2025: 14 CVEs · 1 critical · 0 now in CISA KEV · rank #53 · mostly Firefox, Thunderbird, Firefox EsrFeb 2025: 14 CVEs · 4 critical · 0 now in CISA KEV · rank #55 · mostly Thunderbird, Firefox, Thunderbird EsrMar 2025: 20 CVEs · 3 critical · 0 now in CISA KEV · rank #46 · mostly Firefox, Thunderbird, Firefox EsrApr 2025: 26 CVEs · 1 critical · 0 now in CISA KEV · rank #35 · mostly Thunderbird, Firefox, Firefox EsrMay 2025: 20 CVEs · 1 critical · 0 now in CISA KEV · rank #46 · mostly Thunderbird, Firefox, Firefox EsrJun 2025: 18 CVEs · 5 critical · 0 now in CISA KEV · rank #52 · mostly Firefox, Thunderbird, Firefox EsrJul 2025: 17 CVEs · 6 critical · 0 now in CISA KEV · rank #63 · mostly Firefox, Thunderbird, Firefox EsrAug 2025: 21 CVEs · 6 critical · 0 now in CISA KEV · rank #49 · mostly Firefox, Thunderbird, Firefox EsrSep 2025: 15 CVEs · 0 critical · 0 now in CISA KEV · rank #57 · mostly Firefox, Thunderbird, Firefox EsrOct 2025: 16 CVEs · 7 critical · 0 now in CISA KEV · rank #70 · mostly Firefox, Thunderbird, Firefox EsrNov 2025: 17 CVEs · 5 critical · 0 now in CISA KEV · rank #51 · mostly Firefox, Thunderbird, Firefox EsrDec 2025: 17 CVEs · 5 critical · 0 now in CISA KEV · rank #50 · mostly Firefox, Thunderbird, Firefox EsrJan 2026: 19 CVEs · 4 critical · 0 now in CISA KEV · rank #47 · mostly Firefox, Thunderbird, Firefox EsrFeb 2026: 54 CVEs · 44 critical · 0 now in CISA KEV · rank #9 · mostly Firefox, Thunderbird, Firefox For IOSMar 2026: 51 CVEs · 21 critical · 0 now in CISA KEV · rank #22 · mostly Firefox, Thunderbird, Firefox EsrApr 2026: 52 CVEs · 8 critical · 0 now in CISA KEV · rank #19 · mostly Firefox, Thunderbird, Firefox EsrMay 2026: 44 CVEs · 9 critical · 0 now in CISA KEV · rank #24 · mostly Firefox, Thunderbird, Firefox EsrJun 2026: 50 CVEs · 9 critical · 0 now in CISA KEV · rank #18 · mostly Firefox, Thunderbird, Firefox For IOSJul 2026: 71 CVEs · 39 critical · 0 now in CISA KEV · rank #12 · mostly Firefox, Thunderbird, Firefox MobileAug 2026: 60 CVEs · 17 critical · 0 now in CISA KEV · rank #17 · mostly Firefox, Thunderbird, Firefox MobileSep 2026: 191 CVEs · 53 critical · 0 now in CISA KEV · rank #11 · mostly Thunderbird, Firefox, Firefox MobileOct 2026: 269 CVEs · 13 critical · 0 now in CISA KEV · rank #8 · mostly Thunderbird, Firefox, Firefox For IOSNov 2026: none that month (the list had room for every one)
In the lens
The products that kept showing up in Mozilla's monthly top three from Dec 2021 to Nov 2026. Move the lens and the list follows.
Year by year
Each year's months on the top 200 list. Pick a year to read it in the lens.
The record
- Peak rank
- #1 in 5 months, last Nov 2012
- Busiest month
- Jun 2018, 318 CVEs
- Months with a KEV entry
- 10 of 209 on the list
- On the top 200 list
- 209 of 298 monthly snapshots