Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Zyxel
Vendor reference — Zyxel · sector: Network & Infrastructure. Cumulative disclosure record across the archive.
Career totals
| All-time | YTD | |
|---|---|---|
| CVEs | 17 | 8 |
| KEV entries | 10 | 1 |
| KEV/100 | Med CVSS | Med EPSS | C | H | M | L |
|---|---|---|---|---|---|---|
| 58.8 | 8.8 | .0293 | 7 | 6 | 4 | 0 |
KEV/100 = KEV entries ÷ CVEs × 100. Med CVSS / Med EPSS are medians over all 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 | 1 |
| 2026-06 | 3 |
| 2026-07 | 1 |
| 2026-08 | 3 |
| 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-2020-9054 | 9.8 | 100.0 | CRITICAL | YES | 2020-03-04 |
| CVE-2022-30525 | 9.8 | 100.0 | CRITICAL | YES | 2022-05-12 |
| CVE-2023-28771 | 9.8 | 99.9 | CRITICAL | YES | 2023-04-25 |
| CVE-2023-27992 | 9.8 | 99.7 | CRITICAL | YES | 2023-06-19 |
| CVE-2023-33010 | 9.8 | 98.1 | CRITICAL | YES | 2023-05-24 |
| CVE-2023-33009 | 9.8 | 98.1 | CRITICAL | YES | 2023-05-24 |
| CVE-2024-40891 | 8.8 | 97.6 | HIGH | YES | 2025-02-04 |
| CVE-2024-40890 | 8.8 | 97.5 | HIGH | YES | 2025-02-04 |
| CVE-2024-11667 | 9.8 | 86.6 | CRITICAL | YES | 2024-12-03 |
| CVE-2026-7273 | 8.8 | 84.2 | HIGH | YES | 2026-06-16 |
| CVE-2026-6837 | 7.2 | 73.7 | HIGH | — | 2026-08-04 |
| CVE-2026-6952 | 7.2 | 73.7 | HIGH | — | 2026-07-21 |
| CVE-2026-14818 | 7.2 | 45.3 | HIGH | — | 2026-08-04 |
| CVE-2026-8508 | 6.5 | 22.5 | MEDIUM | — | 2026-08-04 |
| CVE-2026-4795 | 6.5 | 20.6 | MEDIUM | — | 2026-05-26 |
Recent CVEs
| CVE | CVSS | EPSS %ile | Severity | KEV | First seen |
|---|---|---|---|---|---|
| CVE-2026-6837 | 7.2 | 73.7 | HIGH | — | 2026-08-04 |
| CVE-2026-8508 | 6.5 | 22.5 | MEDIUM | — | 2026-08-04 |
| CVE-2026-14818 | 7.2 | 45.3 | HIGH | — | 2026-08-04 |
| CVE-2026-6952 | 7.2 | 73.7 | HIGH | — | 2026-07-21 |
| CVE-2026-7273 | 8.8 | 84.2 | HIGH | YES | 2026-06-16 |
| CVE-2026-3871 | 6.5 | 17.1 | MEDIUM | — | 2026-06-02 |
| CVE-2026-3870 | 6.5 | 17.1 | MEDIUM | — | 2026-06-02 |
| CVE-2026-4795 | 6.5 | 20.6 | MEDIUM | — | 2026-05-26 |
| CVE-2024-40890 | 8.8 | 97.5 | HIGH | YES | 2025-02-04 |
| CVE-2024-40891 | 8.8 | 97.6 | HIGH | YES | 2025-02-04 |
| CVE-2024-11667 | 9.8 | 86.6 | CRITICAL | YES | 2024-12-03 |
| CVE-2023-27992 | 9.8 | 99.7 | CRITICAL | YES | 2023-06-19 |
| CVE-2023-33010 | 9.8 | 98.1 | CRITICAL | YES | 2023-05-24 |
| CVE-2023-33009 | 9.8 | 98.1 | CRITICAL | YES | 2023-05-24 |
| CVE-2023-28771 | 9.8 | 99.9 | CRITICAL | YES | 2023-04-25 |
Products
This vendor's products with a reference page (≥2 disclosures), by CVE count. A monolithic vendor total dilutes signal; product pages sharpen it.
| Product | CVEs | KEV |
|---|---|---|
| ATP Series Firmware | 6 | 5 |
| USG FLEX Series Firmware | 5 | 4 |
| VPN Series Firmware | 4 | 4 |
| USG FLEX 50(W) Firmware | 3 | 3 |
| ZyWALL/USG Series Firmware | 3 | 3 |
| USG FLEX 50(W) Series Firmware | 2 | 1 |
| USG20(W)-VPN Firmware | 2 | 2 |
| USG20(W)-VPN Series Firmware | 2 | 1 |
| VMG4005-B50B Firmware | 2 | 0 |
| VMG4325-B10A Firmware | 2 | 2 |
| WAX650S Firmware | 2 | 0 |
KEV entries
| CVE | KEV added | CVSS | EPSS %ile | Severity |
|---|---|---|---|---|
| CVE-2026-7273 | 2026-09-21 | 8.8 | 84.2 | HIGH |
| CVE-2024-40890 | 2025-02-11 | 8.8 | 97.5 | HIGH |
| CVE-2024-40891 | 2025-02-11 | 8.8 | 97.6 | HIGH |
| CVE-2024-11667 | 2024-12-03 | 9.8 | 86.6 | CRITICAL |
| CVE-2023-27992 | 2023-06-23 | 9.8 | 99.7 | CRITICAL |
| CVE-2023-33010 | 2023-06-05 | 9.8 | 98.1 | CRITICAL |
| CVE-2023-33009 | 2023-06-05 | 9.8 | 98.1 | CRITICAL |
| CVE-2023-28771 | 2023-05-31 | 9.8 | 99.9 | CRITICAL |
| CVE-2022-30525 | 2022-05-16 | 9.8 | 100.0 | CRITICAL |
| CVE-2020-9054 | 2022-03-25 | 9.8 | 100.0 | CRITICAL |
KEV timing
| CVE | Days |
|---|---|
| CVE-2024-11667 | 0 |
| CVE-2022-30525 | 4 |
| CVE-2023-27992 | 4 |
| CVE-2024-40890 | 7 |
| CVE-2024-40891 | 7 |
| CVE-2023-33009 | 12 |
| CVE-2023-33010 | 12 |
| CVE-2023-28771 | 36 |
| CVE-2026-7273 | 97 |
| CVE-2020-9054 | 751 |
| CVE | Due | Days over |
|---|---|---|
| CVE-2020-9054 | 2022-04-15 | 1633 |
| CVE-2022-30525 | 2022-06-06 | 1581 |
| CVE-2023-28771 | 2023-06-21 | 1201 |
| CVE-2023-33009 | 2023-06-26 | 1196 |
| CVE-2023-33010 | 2023-06-26 | 1196 |
| CVE-2023-27992 | 2023-07-14 | 1178 |
| CVE-2024-11667 | 2024-12-24 | 649 |
| CVE-2024-40891 | 2025-03-04 | 579 |
| CVE-2024-40890 | 2025-03-04 | 579 |
| CVE-2026-7273 | 2026-09-24 | 10 |
Methodology
Rate statistics are arithmetic over published figures: KEV/100 = KEV entries ÷ CVEs × 100; medians are taken over this vendor's disclosures. Vendor names are normalized (case, punctuation, common aliases) before aggregation; monthly counts are keyed to first-seen day, the day this archive first observed the record, not the upstream publication date.
Raw counts are not comparable across vendors: disclosure practices, product breadth, and CNA conventions differ widely, so a larger number here does not mean less secure software. This is a reference page assembled from the public record — not a record of its own, and not a ranking of vendors by our judgment.
Sources. CVE records from the CVE Program (cvelistV5); enrichment from NVD (NIST); known-exploited status from the CISA KEV catalog; exploit probability from FIRST EPSS.
