Zyxel vulnerabilities
- Zyxel has 94 CVE records published between 28 Oct 2023 and 28 Oct 2026, ranking #157 of 420 vendors on this site by that count.
- Of the 94 with a CVSS score, 51 (54.3%) are rated critical or high; 0 (0% of all) have no CVSS score.
- 13 vulnerabilities attributed to Zyxel are listed in CISA's Known Exploited Vulnerabilities (KEV) catalog; the most recent, CVE-2026-7273, was added on 21 Sep 2026.
- 2 of them (15.4%) are marked as known to be used in ransomware campaigns.
- For the 13 KEV entries with a published CVE record, the median time from CVE publication to KEV listing is 12 days.
Records are attributed to Zyxel from the vendor named in the source records. About the data.
CVE records per year
Show data as a table
| Year | CVE records |
|---|---|
| 2017 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 2 |
| 2021 | 9 |
| 2022 | 21 |
| 2023 | 60 |
| 2024 | 37 |
| 2025 | 16 |
| 2026 | 24 |
2026 is partial (through 28 Oct 2026), shown in a lighter bar.
| Year | Records | Critical | High | Critical or high | Not scored |
|---|---|---|---|---|---|
| 2026 | 24 | 1 | 10 | 45.8% | 0% |
| 2025 | 16 | 2 | 11 | 81.3% | 0% |
| 2024 | 37 | 5 | 14 | 51.4% | 0% |
| 2023 | 60 | 9 | 27 | 60% | 0% |
| 2022 | 21 | 5 | 6 | 52.4% | 0% |
| 2021 | 9 | 1 | 4 | 55.6% | 0% |
| 2020 | 2 | 2 | 0 | 100% | 0% |
| 2019 | 1 | 1 | 0 | 100% | 0% |
| 2018 | 1 | 0 | 0 | — | 100% |
| 2017 | 2 | 0 | 1 | 100% | 50% |
Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.
Exploited vulnerabilities in CISA's KEV catalog
| CVE | Product | Name | Added | Ransomware |
|---|---|---|---|---|
| CVE-2026-7273 | GS1900 Series Switches | Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability | 2026-09-21 | Unknown |
| CVE-2024-40890 | DSL CPE Devices | Zyxel DSL CPE OS Command Injection Vulnerability | 2025-02-11 | Unknown |
| CVE-2024-40891 | DSL CPE Devices | Zyxel DSL CPE OS Command Injection Vulnerability | 2025-02-11 | Unknown |
| CVE-2024-11667 | Multiple Firewalls | Zyxel Multiple Firewalls Path Traversal Vulnerability | 2024-12-03 | Known |
| CVE-2017-6884 | EMG2926 Routers | Zyxel EMG2926 Routers Command Injection Vulnerability | 2023-09-18 | Known |
| CVE-2017-18368 | P660HN-T1A Routers | Zyxel P660HN-T1A Routers Command Injection Vulnerability | 2023-08-07 | Unknown |
| CVE-2023-27992 | Multiple Network-Attached Storage (NAS) Devices | Zyxel Multiple NAS Devices Command Injection Vulnerability | 2023-06-23 | Unknown |
| CVE-2023-33009 | Multiple Firewalls | Zyxel Multiple Firewalls Buffer Overflow Vulnerability | 2023-06-05 | Unknown |
| CVE-2023-33010 | Multiple Firewalls | Zyxel Multiple Firewalls Buffer Overflow Vulnerability | 2023-06-05 | Unknown |
| CVE-2023-28771 | Multiple Firewalls | Zyxel Multiple Firewalls OS Command Injection Vulnerability | 2023-05-31 | Unknown |
| CVE-2022-30525 | Multiple Firewalls | Zyxel Multiple Firewalls OS Command Injection Vulnerability | 2022-05-16 | Unknown |
| CVE-2020-9054 | Multiple Network-Attached Storage (NAS) Devices | Zyxel Multiple NAS Devices OS Command Injection Vulnerability | 2022-03-25 | Unknown |
| CVE-2020-29583 | Multiple Products | Zyxel Multiple Products Use of Hard-Coded Credentials Vulnerability | 2021-11-03 | Unknown |
Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.
Highest exploit-prediction scores (EPSS)
EPSS estimates the probability that a vulnerability is exploited in the next 30 days. These are the 10 highest-scoring Zyxel records today.
| CVE | EPSS | Percentile | Severity | In KEV |
|---|---|---|---|---|
| CVE-2020-9054 | 100% | 100% | Critical | Yes |
| CVE-2022-30525 | 99.9% | 100% | Critical | Yes |
| CVE-2023-28771 | 99.3% | 99.9% | Critical | Yes |
| CVE-2022-0342 | 95.1% | 99.9% | Critical | No |
| CVE-2017-18368 | 94.5% | 99.9% | Critical | Yes |
| CVE-2024-29972 | 90.3% | 99.8% | Critical | No |
| CVE-2020-29583 | 90.2% | 99.8% | Critical | Yes |
| CVE-2024-29973 | 86.2% | 99.7% | Critical | No |
| CVE-2023-27992 | 82.3% | 99.7% | Critical | Yes |
| CVE-2021-4039 | 71% | 99.4% | Critical | No |
Source: FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.27, as of 27 Oct 2026. About the data.