Risk Letters

Exploited vulnerability

CVE-2017-6884

TLP:CLEAR

Zyxel EMG2926 Routers Command Injection Vulnerability

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.

Facts

  • Vendor: Zyxel
  • Product: EMG2926 Routers
  • CVSS: 8.8
  • EPSS (probability of exploitation within 30 days): 33 %
  • On CISA's Known Exploited Vulnerabilities list since: 18 September 2023
  • First known exploitation: 18 September 2023
  • Used in ransomware campaigns (per CISA): Yes
  • CISA's deadline for US federal agencies: 9 October 2023
  • Weakness: CWE-78
  • First seen by Risk Letters: 18 September 2023

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD