September 18, 2023 · Applied Cybernetics Group
CVE-2017-6884 — Zyxel EMG2926 Routers
known ransomware use
Zyxel EMG2926 Routers Command Injection Vulnerability
- Added to KEV
2023-09-18- Federal due date
2023-10-09- Vendor
- Zyxel
- Product
- EMG2926 Routers
- EPSS
- 98.4th percentile (score 0.368, as of
2026-09-16) - NVD CVSS v3.1
- 8.8 (HIGH)
- Ransomware use
- Known
- Upstream
- https://nvd.nist.gov/vuln/detail/CVE-2017-6884
CISA short description
Zyxel EMG2926 routers contain a command injection vulnerability located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute malicious commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
NVD description
A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.