What is CVE-2017-6884?

CVE-2017-6884 is a high-severity vulnerability in Zyxel Emg2926, classified under OS Command Injection. CVSS score: 8.8/10. Published 2017-04-06.

How severe is CVE-2017-6884?

High severity. CVSS v3 base score is 8.8 out of 10.

Is CVE-2017-6884 known to be exploited?

Yes. CVE-2017-6884 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-18), indicating it is being actively exploited. 7 public proof-of-concept repositories are indexed.

RCE in Zyxel Emg2926

CVE-2017-6884

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.

Vulnerability class: Command Injection (OS Command Injection)

Published 2017-04-06 · last modified 2026-10-01.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.330 (98.3th percentile), scored 2026-10-18.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 98th percentile — 98.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.344 · newest: 0.330 · change: -0.014

Affected products

Zyxel Emg2926
Zyxel Emg2926 Firmware — versions v1.00\(aaqt.4\)b8, v1.00(aaqt.4)b8

Weakness classification (CWE)

CWE-78 — OS Command Injection

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2023-09-18. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2023-10-09.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Known ransomware campaign use: yes.

Public proof-of-concept exploits

References

www.exploit-db.com/exploits/41782/ (Exploit, VDB Entry, Third Party Advisory, exploit)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2017-6884?: CVE-2017-6884 is a high-severity vulnerability in Zyxel Emg2926, classified under OS Command Injection. CVSS score: 8.8/10. Published 2017-04-06.
How severe is CVE-2017-6884?: High severity. CVSS v3 base score is 8.8 out of 10.
Is CVE-2017-6884 known to be exploited?: Yes. CVE-2017-6884 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2023-09-18), indicating it is being actively exploited. 7 public proof-of-concept repositories are indexed.