Mozilla vulnerabilities
- Mozilla has 1,130 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #12 of 420 vendors on this site by that count.
- Of the 1,096 with a CVSS score, 747 (68.2%) are rated critical or high; 34 (3% of all) have no CVSS score.
- 13 vulnerabilities attributed to Mozilla are listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2010-3765, was added on 6 Oct 2025.
- 1 of them (7.7%) is marked as known to be used in ransomware campaigns.
- For the 13 KEV entries with a published CVE record, the median time from CVE publication to KEV listing is 1,035 days.
Records are attributed to Mozilla from the vendor named in the source records. About the data.
CVE records per year
Show data as a table
| Year | CVE records |
|---|---|
| 2017 | 3 |
| 2018 | 351 |
| 2019 | 143 |
| 2020 | 177 |
| 2021 | 149 |
| 2022 | 177 |
| 2023 | 195 |
| 2024 | 202 |
| 2025 | 208 |
| 2026 | 686 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 686 | 200 | 312 | 75% | 0.4% |
| 2025 | 208 | 47 | 77 | 59.6% | 0% |
| 2024 | 202 | 34 | 75 | 54% | 0% |
| 2023 | 195 | 12 | 33 | 57.7% | 60% |
| 2022 | 177 | 18 | 73 | 52% | 1.1% |
| 2021 | 149 | 0 | 1 | 100% | 99.3% |
| 2020 | 177 | 0 | 4 | 80% | 97.2% |
| 2019 | 143 | 1 | 1 | 100% | 98.6% |
| 2018 | 351 | 0 | 1 | 50% | 99.4% |
| 2017 | 3 | 0 | 0 | — | 100% |
| Before 2017 | 595 | ||||
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Exploited vulnerabilities in CISA's KEV catalog
| CVE | Product | Name | Added | Ransomware |
|---|---|---|---|---|
| CVE-2010-3765 | Multiple Products | Mozilla Multiple Products Remote Code Execution Vulnerability | 2025-10-06 | Unknown |
| CVE-2024-9680 | Firefox | Mozilla Firefox Use-After-Free Vulnerability | 2024-10-15 | Known |
| CVE-2016-9079 | Firefox, Firefox ESR, and Thunderbird | Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability | 2023-06-22 | Unknown |
| CVE-2015-4495 | Firefox | Mozilla Firefox Security Feature Bypass Vulnerability | 2022-05-25 | Unknown |
| CVE-2019-11707 | Firefox and Thunderbird | Mozilla Firefox and Thunderbird Type Confusion Vulnerability | 2022-05-23 | Unknown |
| CVE-2019-11708 | Firefox and Thunderbird | Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability | 2022-05-23 | Unknown |
| CVE-2013-1690 | Firefox and Thunderbird | Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability | 2022-03-28 | Unknown |
| CVE-2022-26485 | Firefox | Mozilla Firefox Use-After-Free Vulnerability | 2022-03-07 | Unknown |
| CVE-2022-26486 | Firefox | Mozilla Firefox Use-After-Free Vulnerability | 2022-03-07 | Unknown |
| CVE-2013-1675 | Firefox | Mozilla Firefox Information Disclosure Vulnerability | 2022-03-03 | Unknown |
| CVE-2019-17026 | Firefox and Thunderbird | Mozilla Firefox And Thunderbird Type Confusion Vulnerability | 2021-11-03 | Unknown |
| CVE-2020-6819 | Firefox and Thunderbird | Mozilla Firefox And Thunderbird Use-After-Free Vulnerability | 2021-11-03 | Unknown |
| CVE-2020-6820 | Firefox and Thunderbird | Mozilla Firefox And Thunderbird Use-After-Free Vulnerability | 2021-11-03 | Unknown |
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.
Highest exploit-prediction scores (EPSS)
EPSS estimates the probability that a vulnerability is exploited in the next 30 days. These are the 10 highest-scoring Mozilla records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2016-9079 | 87.4% | 99.8% | High | Yes |
| CVE-2014-1511 | 83.5% | 99.7% | Not scored | No |
| CVE-2010-3765 | 83.2% | 99.7% | Critical | Yes |
| CVE-2014-1510 | 82.2% | 99.7% | Not scored | No |
| CVE-2013-0758 | 73.4% | 99.5% | Not scored | No |
| CVE-2024-4367 | 70.7% | 99.4% | Medium | No |
| CVE-2013-1690 | 69% | 99.3% | High | Yes |
| CVE-2015-4495 | 68.6% | 99.3% | High | Yes |
| CVE-2015-0802 | 65.9% | 99.3% | Not scored | No |
| CVE-2015-0816 | 65.5% | 99.3% | Not scored | No |
Source: FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.