CVE-2017-6884

CRITICALNVD 8.89.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2023-09-18), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 8.8 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 4 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 34%CVSS: 8.8Exploit: cisa kev · ssvc active · kev ransomware · epss top5pct · public exploitExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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 v3
8.8
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
34%
EPSS %ILE
98%
KEV
⚠ Exploited

Published

April 6, 2017

Last Modified

August 4, 2026

Advisory Details (2)

Auto-updated May 2, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6884
generic🟡 PoC Available

Zyxel, EMG2926 < V1.00(AAQT.4)b8 - OS Command Injection - Hardware webapps Exploit

https://www.exploit-db.com/exploits/41782/

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 59× in last 7d / 251× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 949 total refreshes for this CVE.

  1. 2026-09-19 22:32 UTCGHSA enrichment
  2. 2026-09-19 18:49 UTCEG score recompute
  3. 2026-09-19 18:49 UTCGHSA enrichment
  4. 2026-09-19 15:36 UTCEPSS rescore
  5. 2026-09-19 15:05 UTCGHSA enrichment
  6. 2026-09-19 11:20 UTCGHSA enrichment
  7. 2026-09-19 07:37 UTCGHSA enrichment
  8. 2026-09-19 03:53 UTCGHSA enrichment
  9. 2026-09-19 00:11 UTCGHSA enrichment
  10. 2026-09-18 20:28 UTCEG score recompute
  11. 2026-09-18 20:28 UTCGHSA enrichment
  12. 2026-09-18 19:20 UTCCISA KEV update
  13. 2026-09-18 16:44 UTCGHSA enrichment
  14. 2026-09-18 14:15 UTCCISA KEV update
  15. 2026-09-18 13:01 UTCGHSA enrichment
  16. 2026-09-18 09:18 UTCGHSA enrichment
  17. 2026-09-18 05:35 UTCGHSA enrichment
  18. 2026-09-18 01:52 UTCGHSA enrichment
  19. 2026-09-17 22:09 UTCEG score recompute
  20. 2026-09-17 22:09 UTCGHSA enrichment
  21. 2026-09-17 19:22 UTCEPSS rescore
  22. 2026-09-17 19:22 UTCEPSS rescore
  23. 2026-09-17 18:26 UTCGHSA enrichment
  24. 2026-09-17 14:42 UTCGHSA enrichment
  25. 2026-09-17 10:59 UTCGHSA enrichment
Show 75 more
  1. 2026-09-17 07:16 UTCGHSA enrichment
  2. 2026-09-17 03:33 UTCGHSA enrichment
  3. 2026-09-16 23:50 UTCGHSA enrichment
  4. 2026-09-16 20:07 UTCGHSA enrichment
  5. 2026-09-16 16:24 UTCEG score recompute
  6. 2026-09-16 16:24 UTCGHSA enrichment
  7. 2026-09-16 14:10 UTCCISA KEV update
  8. 2026-09-16 12:39 UTCGHSA enrichment
  9. 2026-09-16 08:56 UTCGHSA enrichment
  10. 2026-09-16 05:13 UTCEG score recompute
  11. 2026-09-16 05:13 UTCGHSA enrichment
  12. 2026-09-16 01:30 UTCGHSA enrichment
  13. 2026-09-15 21:47 UTCGHSA enrichment
  14. 2026-09-15 18:04 UTCGHSA enrichment
  15. 2026-09-15 14:21 UTCGHSA enrichment
  16. 2026-09-15 10:37 UTCGHSA enrichment
  17. 2026-09-15 06:53 UTCGHSA enrichment
  18. 2026-09-15 03:10 UTCEG score recompute
  19. 2026-09-15 03:10 UTCGHSA enrichment
  20. 2026-09-15 03:05 UTCEPSS rescore
  21. 2026-09-14 23:26 UTCGHSA enrichment
  22. 2026-09-14 19:43 UTCGHSA enrichment
  23. 2026-09-14 19:24 UTCCISA KEV update
  24. 2026-09-14 16:00 UTCGHSA enrichment
  25. 2026-09-14 12:17 UTCGHSA enrichment
  26. 2026-09-14 08:34 UTCGHSA enrichment
  27. 2026-09-14 04:52 UTCGHSA enrichment
  28. 2026-09-14 01:09 UTCGHSA enrichment
  29. 2026-09-13 21:27 UTCGHSA enrichment
  30. 2026-09-13 17:44 UTCGHSA enrichment
  31. 2026-09-13 14:01 UTCGHSA enrichment
  32. 2026-09-13 10:18 UTCGHSA enrichment
  33. 2026-09-13 06:35 UTCGHSA enrichment
  34. 2026-09-13 02:53 UTCGHSA enrichment
  35. 2026-09-12 23:10 UTCGHSA enrichment
  36. 2026-09-12 19:26 UTCGHSA enrichment
  37. 2026-09-12 15:44 UTCEG score recompute
  38. 2026-09-12 15:44 UTCGHSA enrichment
  39. 2026-09-12 14:56 UTCEPSS rescore
  40. 2026-09-12 12:01 UTCGHSA enrichment
  41. 2026-09-12 08:17 UTCGHSA enrichment
  42. 2026-09-12 04:34 UTCGHSA enrichment
  43. 2026-09-12 00:51 UTCGHSA enrichment
  44. 2026-09-11 21:08 UTCGHSA enrichment
  45. 2026-09-11 18:49 UTCCISA KEV update
  46. 2026-09-11 17:25 UTCEG score recompute
  47. 2026-09-11 17:25 UTCGHSA enrichment
  48. 2026-09-11 13:42 UTCGHSA enrichment
  49. 2026-09-11 10:00 UTCEG score recompute
  50. 2026-09-11 09:59 UTCGHSA enrichment
  51. 2026-09-11 09:31 UTCEPSS rescore
  52. 2026-09-11 06:14 UTCGHSA enrichment
  53. 2026-09-11 02:31 UTCGHSA enrichment
  54. 2026-09-10 22:48 UTCGHSA enrichment
  55. 2026-09-10 19:28 UTCCISA KEV update
  56. 2026-09-10 19:05 UTCGHSA enrichment
  57. 2026-09-10 15:22 UTCGHSA enrichment
  58. 2026-09-10 11:39 UTCEG score recompute
  59. 2026-09-10 11:39 UTCGHSA enrichment
  60. 2026-09-10 07:56 UTCGHSA enrichment
  61. 2026-09-10 04:13 UTCGHSA enrichment
  62. 2026-09-10 00:30 UTCGHSA enrichment
  63. 2026-09-09 20:45 UTCGHSA enrichment
  64. 2026-09-09 19:08 UTCCISA KEV update
  65. 2026-09-09 17:01 UTCGHSA enrichment
  66. 2026-09-09 13:19 UTCGHSA enrichment
  67. 2026-09-09 09:33 UTCGHSA enrichment
  68. 2026-09-09 05:50 UTCGHSA enrichment
  69. 2026-09-09 02:07 UTCGHSA enrichment
  70. 2026-09-08 22:25 UTCEG score recompute
  71. 2026-09-08 22:24 UTCGHSA enrichment
  72. 2026-09-08 18:54 UTCCISA KEV update
  73. 2026-09-08 18:37 UTCGHSA enrichment
  74. 2026-09-08 14:53 UTCGHSA enrichment
  75. 2026-09-08 11:08 UTCGHSA enrichment

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Exploit-DBEDB-41782
    First seen Apr 2, 2017

    Zyxel_ EMG2926 < V1.00(AAQT.4)b8 - OS Command Injection

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2017-6884?
CVE-2017-6884 is a critical vulnerability published on April 6, 2017. 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…
When was CVE-2017-6884 disclosed?
CVE-2017-6884 was first published in the National Vulnerability Database on April 6, 2017, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-6884 actively exploited?
Yes. CISA added CVE-2017-6884 to the Known Exploited Vulnerabilities catalog on September 18, 2023, affecting Zyxel EMG2926 Routers. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2017-6884?
CVE-2017-6884 has a CVSS v3 base score of 8.8 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2017-6884?
CVE-2017-6884 affects Zyxel EMG2926 Routers. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2017-6884?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-6884, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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