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CVE-2017-6884

Zyxel EMG2926 Routers Command Injection

8.8 HIGHActively exploited (CISA KEV)Used in ransomwarePublic exploitEPSS 34.6%
  1. Published6 Apr 2017
  2. Added to CISA KEV18 Sept 2023
  3. Remediation due9 Oct 2023
Actively exploited (CISA KEV)

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.

Added to KEV: 18 Sept 2023Federal remediation due: 9 Oct 2023Used in ransomware

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 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

Zyxel Emg2926 Firmwarev1.00\(aaqt.4\)b8

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2017-6884 being actively exploited?

Yes. CVE-2017-6884 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 18 Sept 2023. It has been used in ransomware campaigns.

How severe is CVE-2017-6884?

CVE-2017-6884 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 34.6% probability of exploitation.

Which products are affected by CVE-2017-6884?

Affected products include Zyxel Emg2926 Firmware.

How do I fix CVE-2017-6884?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-6884 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.