Vendor dossier / #21
Mozilla vulnerabilities in CISA KEV
Answer CISA's KEV catalog lists 13 Mozilla vulnerabilities as of catalog 2026.09.23, 0.8% of all 1,721 entries and rank 21 of 283 vendors. The first was added on 2021-11-03 and the most recent on 2025-10-06; 1 is flagged as used in ransomware campaigns.
- KEV entries
- 130.8% of catalog
- Last 90 days
- +0added
- Ransomware: known
- 17.7%
- Products
- 4distinct
- First added
- 2021-11-03
- Latest added
- 2025-10-06
- Median days to due
- 21
- Open deadlines
- 0federal
TAdditions per quarter
Table view (by year)
| Year | Added |
|---|---|
| 2021 | 3 |
| 2022 | 7 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 0 |
QCommon questions
How many Mozilla vulnerabilities are in CISA KEV?
13, as of KEV catalog 2026.09.23 (released 2026-09-23). That is 0.8% of the catalog.
Which Mozilla product has the most KEV entries?
Firefox and Thunderbird, with 6 entries. 4 products appear in total.
How many Mozilla KEV vulnerabilities are linked to ransomware?
1 of 13 (7.7%) are flagged by CISA as known to be used in ransomware campaigns.
When was the latest Mozilla vulnerability added to KEV?
2025-10-06 (CVE-2010-3765).
What is the most common weakness in Mozilla KEV entries?
CWE-416 (Use after free), listed on 5 entries.
PProducts
| Product | Entries | Share of vendor |
|---|---|---|
| Firefox and Thunderbird | 6 | 46.2% |
| Firefox | 5 | 38.5% |
| Multiple Products | 1 | 7.7% |
| Firefox, Firefox ESR, and Thunderbird | 1 | 7.7% |
WWeaknesses
| CWE | Entries | Share of vendor |
|---|---|---|
| CWE-416 Use after free | 5 | 38.5% |
| CWE-843 Type confusion | 2 | 15.4% |
| CWE-119 Memory buffer bounds error | 2 | 15.4% |
| CWE-362 Race condition | 2 | 15.4% |
| CWE-200 Information exposure | 1 | 7.7% |
| CWE-20 Improper input validation | 1 | 7.7% |
| No CWE listed | 1 | 7.7% |
EAll 13 entries
| CVE | Product | Vulnerability | Added | Due | Ransomware | CWE |
|---|---|---|---|---|---|---|
| CVE-2010-3765 | Multiple Products | Mozilla Multiple Products Remote Code Execution Vulnerability | Unknown | none listed | ||
| CVE-2024-9680 | Firefox | Mozilla Firefox Use-After-Free Vulnerability | Known | CWE-416 | ||
| CVE-2016-9079 | Firefox, Firefox ESR, and Thunderbird | Mozilla Firefox, Firefox ESR, and Thunderbird Use-After-Free Vulnerability | Unknown | CWE-416 | ||
| CVE-2015-4495 | Firefox | Mozilla Firefox Security Feature Bypass Vulnerability | Unknown | CWE-200 | ||
| CVE-2019-11708 | Firefox and Thunderbird | Mozilla Firefox and Thunderbird Sandbox Escape Vulnerability | Unknown | CWE-20 | ||
| CVE-2019-11707 | Firefox and Thunderbird | Mozilla Firefox and Thunderbird Type Confusion Vulnerability | Unknown | CWE-843 | ||
| CVE-2013-1690 | Firefox and Thunderbird | Mozilla Firefox and Thunderbird Denial-of-Service Vulnerability | Unknown | CWE-119 | ||
| CVE-2022-26486 | Firefox | Mozilla Firefox Use-After-Free Vulnerability | Unknown | CWE-416 | ||
| CVE-2022-26485 | Firefox | Mozilla Firefox Use-After-Free Vulnerability | Unknown | CWE-416 | ||
| CVE-2013-1675 | Firefox | Mozilla Firefox Information Disclosure Vulnerability | Unknown | CWE-119 | ||
| CVE-2020-6820 | Firefox and Thunderbird | Mozilla Firefox And Thunderbird Use-After-Free Vulnerability | Unknown | CWE-362 | ||
| CVE-2020-6819 | Firefox and Thunderbird | Mozilla Firefox And Thunderbird Use-After-Free Vulnerability | Unknown | CWE-362, CWE-416 | ||
| CVE-2019-17026 | Firefox and Thunderbird | Mozilla Firefox And Thunderbird Type Confusion Vulnerability | Unknown | CWE-843 |
Cite this
CISA's Known Exploited Vulnerabilities catalog lists 13 Mozilla vulnerabilities (0.8% of all entries). Source: Telemetry analysis of the CISA Known Exploited Vulnerabilities catalog, version 2026.09.23 (released 2026-09-23). https://glide-telemetry.pages.dev/vendors/mozilla/
Source: CISA KEV catalog v2026.09.23, released 2026-09-23. Windows end 2026-09-23. Vendor names are CISA's vendorProject strings; Telemetry states no facts about Mozilla beyond this data.