Reference page — cumulative record through Wednesday, October 7, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Firefox ESR
Product reference — Firefox ESR by Mozilla · sector: Open Source Ecosystems. Cumulative disclosure record for this product across the archive.
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Product totals
| All-time | YTD | |
|---|---|---|
| CVEs | 9 | 0 |
| KEV entries | 9 | 0 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 100.0 | 8.8 | .2318 | 3 | 6 | 0 | 0 |
KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over this product's disclosures. C/H/M/L = disclosures by CVSS severity band.
Monthly disclosures
Trend (by first-seen month, full archive): ▅▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▅█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁█▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▅▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
| Month | New CVEs |
|---|---|
| 2025-11 | 0 |
| 2025-12 | 0 |
| 2026-01 | 0 |
| 2026-02 | 0 |
| 2026-03 | 0 |
| 2026-04 | 0 |
| 2026-05 | 0 |
| 2026-06 | 0 |
| 2026-07 | 0 |
| 2026-08 | 0 |
| 2026-09 | 0 |
| 2026-10 | 0 |
Notable CVEs
Ranked by the published formula: KEV → EPSS → CVSS → CVE ID.
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2016-9079 | 7.5 | 99.8 | HIGH | YES | 2018-06-11 |
| CVE-2019-11708 | 10.0 | 99.0 | CRITICAL | YES | 2019-07-23 |
| CVE-2019-17026 | 8.8 | 98.8 | HIGH | YES | 2020-03-02 |
| CVE-2019-11707 | 8.8 | 98.5 | HIGH | YES | 2019-07-23 |
| CVE-2024-9680 | 9.8 | 97.7 | CRITICAL | YES | 2024-10-15 |
| CVE-2022-26485 | 8.8 | 96.5 | HIGH | YES | 2022-12-22 |
| CVE-2020-6820 | 8.1 | 94.0 | HIGH | YES | 2020-04-24 |
| CVE-2020-6819 | 8.1 | 87.1 | HIGH | YES | 2020-04-24 |
| CVE-2022-26486 | 9.6 | 83.1 | CRITICAL | YES | 2022-12-22 |
Recent CVEs
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2024-9680 | 9.8 | 97.7 | CRITICAL | YES | 2024-10-15 |
| CVE-2022-26485 | 8.8 | 96.5 | HIGH | YES | 2022-12-22 |
| CVE-2022-26486 | 9.6 | 83.1 | CRITICAL | YES | 2022-12-22 |
| CVE-2020-6820 | 8.1 | 94.0 | HIGH | YES | 2020-04-24 |
| CVE-2020-6819 | 8.1 | 87.1 | HIGH | YES | 2020-04-24 |
| CVE-2019-17026 | 8.8 | 98.8 | HIGH | YES | 2020-03-02 |
| CVE-2019-11708 | 10.0 | 99.0 | CRITICAL | YES | 2019-07-23 |
| CVE-2019-11707 | 8.8 | 98.5 | HIGH | YES | 2019-07-23 |
| CVE-2016-9079 | 7.5 | 99.8 | HIGH | YES | 2018-06-11 |
KEV entries
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2024-9680 | 2024-10-15 | 9.8 | 97.7 | CRITICAL |
| CVE-2016-9079 | 2023-06-22 | 7.5 | 99.8 | HIGH |
| CVE-2019-11708 | 2022-05-23 | 10.0 | 99.0 | CRITICAL |
| CVE-2019-11707 | 2022-05-23 | 8.8 | 98.5 | HIGH |
| CVE-2022-26485 | 2022-03-07 | 8.8 | 96.5 | HIGH |
| CVE-2022-26486 | 2022-03-07 | 9.6 | 83.1 | CRITICAL |
| CVE-2019-17026 | 2021-11-03 | 8.8 | 98.8 | HIGH |
| CVE-2020-6820 | 2021-11-03 | 8.1 | 94.0 | HIGH |
| CVE-2020-6819 | 2021-11-03 | 8.1 | 87.1 | HIGH |
Related
Vendor: Mozilla — all products and the full vendor record.
Methodology
A product is a (vendor, product) pair as named in the affected-product data. Rate statistics are arithmetic over published figures. Counts key to first-seen day. Raw counts are not comparable across products; this is a reference page assembled from the public record, not a ranking by our judgment.
Sources. CVE Program (cvelistV5), NVD (NIST), CISA KEV, FIRST EPSS.
