Is Zyxel safe right now?
No new exploited flaws in the last 30 days, but 1 in the last 90. Make sure those updates are installed.
Exploited in the last 90 days
- GS1900 Series SwitchesZyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability
What to do: Install the vendor's security update. If there isn't one yet, apply the vendor's workaround, or stop using the product until it's fixed. CISA lists this as actively exploited, so treat it as urgent.
Earlier exploited flaws
- Zyxel DSL CPE OS Command Injection Vulnerability Zero-day
- Zyxel DSL CPE OS Command Injection Vulnerability Zero-day
- Zyxel Multiple Firewalls Path Traversal Vulnerability Zero-day
- Zyxel EMG2926 Routers Command Injection Vulnerability
- Zyxel P660HN-T1A Routers Command Injection Vulnerability
- Zyxel Multiple NAS Devices Command Injection Vulnerability Zero-day
- Zyxel Multiple Firewalls Buffer Overflow Vulnerability
- Zyxel Multiple Firewalls Buffer Overflow Vulnerability
- Zyxel Multiple Firewalls OS Command Injection Vulnerability
- Zyxel Multiple Firewalls OS Command Injection Vulnerability Zero-day
- Zyxel Multiple NAS Devices OS Command Injection Vulnerability
- Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability
By year
| Year | Exploited flaws added | Zero-days |
|---|---|---|
| 2026 (so far) | 1 | 0 |
| 2025 | 2 | 2 |
| 2024 | 1 | 1 |
| 2023 | 6 | 1 |
| 2022 | 2 | 1 |
Questions
Is Zyxel safe right now?
No new exploited flaws in the last 30 days, but 1 in the last 90. Make sure those updates are installed. Confirm with the vendor's own advisories and install updates as soon as they're available.
How many Zyxel vulnerabilities have been exploited?
13 flaws are on CISA's list of vulnerabilities known to be exploited in real attacks, 2 of them used by ransomware.
Covers products matching zyxel. Sources: CISA's Known Exploited Vulnerabilities catalog and the vendors' own advisories. Updated every hour. General information only; confirm details with the vendor.