Zyxel EMG2926 Routers Command Injection Vulnerability (CVE-2017-6884)
Severity: high · Patch status: unknown · Since 2023-09-18 · CVE-2017-6884
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 pingip parameter to the expert/maintenance/diagnostic/nslookup URI. CISA added CVE-2017-6884 to its Known Exploited Vulnerabilities catalog on Sep 18, 2023, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Oct 9, 2023 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
