CVE-2017-6884
Zyxel EMG2926 Routers Command Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 9 October 2023). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 36.77% probability · 98th percentile
- CISA KEV
- Listed 18 September 2023 · due 9 October 2023 · used in ransomware campaigns
- Weakness
- CWE-78
- Affected
- zyxel/emg2926 firmware
- Source
- cve@mitre.org
CISA notes
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-command-injection-vulnerability-in-emg2926-q10a-ethernet-cpe, https://www.zyxelguard.com/Zyxel-EOL.asp; https://nvd.nist.gov/vuln/detail/CVE-2017-6884
References
- https://www.exploit-db.com/exploits/41782/Exploit, Third Party Advisory, VDB Entry
- https://www.exploit-db.com/exploits/41782/Exploit, Third Party Advisory, VDB Entry
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6884US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.