Exploited CVEs / By vendor / Zyxel
Zyxel vulnerabilities actively exploited
12 Zyxel 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-2024-40890 (DSL CPE Devices, added 2025-02-11). 2 of the 12 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 Zyxel exploited CVEs
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Multiple Firewalls: 5 exploited CVEs
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2024-11667 | Multiple Firewalls | 2024-12-03 | ransomware, CVSS 9.8, EPSS 3% |
| CVE-2023-33009 | Multiple Firewalls | 2023-06-05 | CVSS 9.8, EPSS 28% |
| CVE-2023-33010 | Multiple Firewalls | 2023-06-05 | CVSS 9.8, EPSS 29% |
| CVE-2023-28771 | Multiple Firewalls | 2023-05-31 | CVSS 9.8, EPSS 99% |
| CVE-2022-30525 | Multiple Firewalls | 2022-05-16 | CVSS 9.8, EPSS 100% |
Other Zyxel products
| CVE | Product | Added to KEV | Signals |
|---|---|---|---|
| CVE-2024-40890 | DSL CPE Devices | 2025-02-11 | CVSS 8.8, EPSS 22% |
| CVE-2024-40891 | DSL CPE Devices | 2025-02-11 | CVSS 8.8, EPSS 22% |
| CVE-2017-6884 | EMG2926 Routers | 2023-09-18 | ransomware, CVSS 8.8, EPSS 38% |
| CVE-2017-18368 | P660HN-T1A Routers | 2023-08-07 | CVSS 9.8, EPSS 95% |
| CVE-2023-27992 | Multiple Network-Attached Storage (NAS) Devices | 2023-06-23 | CVSS 9.8, EPSS 84% |
| CVE-2020-9054 | Multiple Network-Attached Storage (NAS) Devices | 2022-03-25 | CVSS 9.8, EPSS 100% |
| CVE-2020-29583 | Multiple Products | 2021-11-03 | CVSS 9.8, EPSS 90% |
Common questions about exploited Zyxel CVEs
Which Zyxel vulnerabilities are actively exploited?
As of August 2026, 12 Zyxel CVEs are on the CISA Known Exploited Vulnerabilities catalog, meaning exploitation in the wild is confirmed. The most-listed products are Multiple Firewalls (5). 2 are linked to ransomware campaigns.
What is the newest exploited Zyxel CVE?
CVE-2024-40890, affecting DSL CPE Devices, added to the CISA KEV catalog on 2025-02-11. This page refreshes daily, so the newest entry is always first in the table.
How urgent are these Zyxel 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 Zyxel CVEs?
Yes. This page includes a free copy-paste AI prompt carrying the newest Zyxel 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.