Mozilla
3,713 CVEs across 208 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
Oct 2021: not on the top 200 that monthNov 2021: 14 CVEs · 0 critical · 0 now in CISA KEV · rank #39 · mostly Firefox, Thunderbird, Firefox EsrDec 2021: 28 CVEs · 2 critical · 0 now in CISA KEV · rank #23 · mostly Firefox, Thunderbird, Firefox EsrJan 2022: not on the top 200 that monthFeb 2022: not on the top 200 that monthMar 2022: not on the top 200 that monthApr 2022: not on the top 200 that monthMay 2022: 4 CVEs · 0 critical · 0 now in CISA KEV · rank #148 · mostly Convict, Hawk, GeckodriverJun 2022: not on the top 200 that monthJul 2022: not on the top 200 that monthAug 2022: not on the top 200 that monthSep 2022: not on the top 200 that monthOct 2022: not on the top 200 that monthNov 2022: not on the top 200 that monthDec 2022: 175 CVEs · 18 critical · 2 now in CISA KEV · rank #4 · mostly Firefox, Thunderbird, Firefox EsrJan 2023: not on the top 200 that monthFeb 2023: 7 CVEs · 1 critical · 0 now in CISA KEV · rank #93 · mostly Bleach, Firefox, Mozilla BleachMar 2023: not on the top 200 that monthApr 2023: not on the top 200 that monthMay 2023: not on the top 200 that monthJun 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: not on the top 200 that monthJan 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 so far: 113 CVEs · 13 critical · 0 now in CISA KEV · rank #11 · mostly Thunderbird, Firefox, Firefox Mobile
In the lens
The products that kept showing up in Mozilla's monthly top three from Oct 2021 to Sep 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 208 on the list
- On the top 200 list
- 208 of 315 monthly snapshots