Exploited CVEs / By vendor / Mozilla
Mozilla vulnerabilities actively exploited
13 Mozilla CVEs on the CISA Known Exploited Vulnerabilities catalog, newest first. Refreshed daily.
Every CVE below is confirmed exploited in the wild, not just theoretically severe. The newest addition is CVE-2010-3765 (Multiple Products, added 2025-10-06). 1 of the 13 are used in ransomware campaigns. New CISA KEV entries appear here the day they are cataloged; the freshest across all vendors are on exploited this week.
Senserva AI Opinion and rich prompt for Mozilla exploited CVEs
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Firefox and Thunderbird: 6 exploited CVEs
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2019-11707 | Firefox and Thunderbird | 2022-05-23 | CVSS 8.8, EPSS 38% |
| CVE-2019-11708 | Firefox and Thunderbird | 2022-05-23 | CVSS 10.0, EPSS 56% |
| CVE-2013-1690 | Firefox and Thunderbird | 2022-03-28 | CVSS 8.8, EPSS 69% |
| CVE-2019-17026 | Firefox and Thunderbird | 2021-11-03 | CVSS 8.8, EPSS 44% |
| CVE-2020-6819 | Firefox and Thunderbird | 2021-11-03 | CVSS 8.1, EPSS 3% |
| CVE-2020-6820 | Firefox and Thunderbird | 2021-11-03 | CVSS 8.1, EPSS 6% |
Firefox: 5 exploited CVEs
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2024-9680 | Firefox | 2024-10-15 | ransomware, CVSS 9.8, EPSS 23% |
| CVE-2015-4495 | Firefox | 2022-05-25 | CVSS 8.8, EPSS 69% |
| CVE-2022-26485 | Firefox | 2022-03-07 | CVSS 8.8, EPSS 14% |
| CVE-2022-26486 | Firefox | 2022-03-07 | CVSS 9.6, EPSS 2% |
| CVE-2013-1675 | Firefox | 2022-03-03 | CVSS 6.5, EPSS 7% |
Other Mozilla products
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2010-3765 | Multiple Products | 2025-10-06 | CVSS 9.8, EPSS 83% |
| CVE-2016-9079 | Firefox, Firefox ESR, and Thunderbird | 2023-06-22 | CVSS 7.5, EPSS 88% |
Common questions about exploited Mozilla CVEs
Which Mozilla vulnerabilities are actively exploited?
As of August 2026, 13 Mozilla CVEs are on the CISA Known Exploited Vulnerabilities catalog, meaning exploitation in the wild is confirmed. The most-listed products are Firefox and Thunderbird (6), Firefox (5). 1 are linked to ransomware campaigns.
What is the newest exploited Mozilla CVE?
CVE-2010-3765, affecting Multiple Products, added to the CISA KEV catalog on 2025-10-06. This page refreshes daily, so the newest entry is always first in the table.
How urgent are these Mozilla CVEs?
KEV listing is the strongest fix-first signal there is: it means confirmed exploitation, not a prediction. Patch these ahead of higher-CVSS issues that nobody is exploiting. Check the vendor advisory (linked below) for fixed versions and workarounds.
Can I ask my own AI about exploited Mozilla CVEs?
Yes. This page includes a free copy-paste AI prompt carrying the newest Mozilla KEV entries, with CVSS, EPSS, and ransomware context, into Claude, ChatGPT, or Copilot. The data is refreshed twice a day (5 AM and 3 PM US Central).
Authoritative references
All vendors, searchable with due dates and CSV export: the exploited-CVE tracker. Every vendor with a page: exploited by vendor.