CVE-2017-6884VulnerabilityPublished 09/18/2023Updated 10/24/2026
CVE-2017-6884: Zyxel EMG2926 Routers Command Injection Vulnerability
Affects Zyxel EMG2926 RoutersSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 09/18/2023
- KEV deadline
- 10/09/2023
- Ransomware
- Used in ransomware campaigns
- EPSS
- 33.0% chance of exploitation in 30 days – higher than 98% of CVEs
What to do
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
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.
Weaknesses
References
- zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-vulnerability-in-emg2926-q10a-ethernet-cpe, (opens in a new tab)
- zyxelguard.com/Zyxel-EOL.asp (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2017-6884 (opens in a new tab)
- cisa.gov/known-exploited-vulnerabilities-catalog?search=CVE-2017-6884 (opens in a new tab)