How we count
Every figure on this page is a direct count of entries in CISA’s Known Exploited Vulnerabilities catalog attributed by CISA to Zyxel (KEV field vendorProject), refreshed daily. “Ransomware-linked” counts entries CISA marks as known to be used in ransomware campaigns; the remainder are “unknown” to CISA, not confirmed ransomware-free. A KEV listing means the vulnerability has been observed exploited in the wild. Snapshot as of 2026-08-31.
Exploited Zyxel vulnerabilities (CISA KEV)
| CVE | Product | Vulnerability | Added | |
|---|---|---|---|---|
| CVE-2024-40891 | DSL CPE Devices | Zyxel DSL CPE OS Command Injection Vulnerability | 2025-02-11 | |
| CVE-2024-40890 | DSL CPE Devices | Zyxel DSL CPE OS Command Injection Vulnerability | 2025-02-11 | |
| CVE-2024-11667 | Multiple Firewalls | Zyxel Multiple Firewalls Path Traversal Vulnerability | 2024-12-03 | ransomware |
| CVE-2017-6884 | EMG2926 Routers | Zyxel EMG2926 Routers Command Injection Vulnerability | 2023-09-18 | ransomware |
| CVE-2017-18368 | P660HN-T1A Routers | Zyxel P660HN-T1A Routers Command Injection Vulnerability | 2023-08-07 | |
| CVE-2023-27992 | Multiple Network-Attached Storage (NAS) Devices | Zyxel Multiple NAS Devices Command Injection Vulnerability | 2023-06-23 | |
| CVE-2023-33009 | Multiple Firewalls | Zyxel Multiple Firewalls Buffer Overflow Vulnerability | 2023-06-05 | |
| CVE-2023-33010 | Multiple Firewalls | Zyxel Multiple Firewalls Buffer Overflow Vulnerability | 2023-06-05 | |
| CVE-2023-28771 | Multiple Firewalls | Zyxel Multiple Firewalls OS Command Injection Vulnerability | 2023-05-31 | |
| CVE-2022-30525 | Multiple Firewalls | Zyxel Multiple Firewalls OS Command Injection Vulnerability | 2022-05-16 | |
| CVE-2020-9054 | Multiple Network-Attached Storage (NAS) Devices | Zyxel Multiple NAS Devices OS Command Injection Vulnerability | 2022-03-25 | |
| CVE-2020-29583 | Multiple Products | Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability | 2021-11-03 |
← All vendors by exploited-vulnerability count
🤖 Generated by defend.network from the CISA KEV catalog. Counts are deterministic aggregates of official CISA data; verify individual advisories at the linked sources.