ExploitedIn CISA KEV

CVE-2017-6884

Exploitation confirmed. First attested on 2023-09-18 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2017-04-06
WeaknessCWE-78

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2017-04-0617:59CVE publishedNVD
2023-09-18Added to the CISA KEV catalogCISA KEV
2023-09-18Listed as exploited by GCVEGCVE
2023-09-18Exploitation first reportedCISA KEV
2026-08-0403:55SSVC exploitation set to activeCISA-ADP
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2017-6884?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2017-6884?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Zyxel emg2926 firmwareversion to verify

Branch	Affected	Fixed in	Source
1.0	= v1.00\(aaqt.4\)b8	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

CISA’s required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.due 2023-10-09

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2023-09-18
Patch Due Date: 2023-10-09
Ransomware Use: Known
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Sources

CISA KEVKEV entry2023-09-18
GCVEexploitation2023-09-18
CISA-ADPSSVC decisionactive2026-08-04
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.18.82025-02-03
NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.09read 2026-10-23
CISA-ADPweakness (CWE)CWE-782025-02-03
NVDweakness (CWE)CWE-78read 2026-10-23
FIRST EPSSEPSS score33.0 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2017-04-06
Last Modified: 2026-10-01
NVD status: Analyzed

Frequently asked questions

What is CVE-2017-6884?

Is CVE-2017-6884 actively exploited?

Yes. CVE-2017-6884 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2023-10-09.

What is the CVSS score for CVE-2017-6884?

CVE-2017-6884 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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