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CVE-2017-3216

Critical Vulnerability: CVE-2017-3216 — greenpacket, huawei — ox350_firmware, ox350

WiMAX routers based on the MediaTek SDK (libmtk) that use a custom httpd plugin are vulnerable to an authentication bypass allowing a remote, unauthenticated attacker to gain administrator access to the device by performing an administrator password change on the device via a crafted POST request.

Wednesday, May 13, 2026greenpacket, huaweiVulnios Threat Intelligence
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Vulnerability Snapshot

CVE-2017-3216 is rated CRITICAL — exploitation is trivial or already observed in the wild and impact is severe. Patch immediately, not on the next maintenance window.

Affected technology: ox350_firmware, ox350, bm2022_firmware, bm2022, hes-309m_firmware, plus 5 other product variants.

Executive Summary

WiMAX routers based on the MediaTek SDK (libmtk) that use a custom httpd plugin are vulnerable to an authentication bypass allowing a remote, unauthenticated attacker to gain administrator access to the device by performing an administrator password change on the device via a crafted POST request.

Why It Matters

CVE-2017-3216 is rated CRITICAL severity, requiring immediate attention from security teams.

CVSS Base Score: 9.8/10

Affected Technologies

Vendors: greenpacket, huawei, mada, zte, zyxel

Products: ox350_firmware, ox350, bm2022_firmware, bm2022, hes-309m_firmware, hes-309m, hes-319m_firmware, hes-319m, hes-319m2w_firmware, hes-319m2w, hes-339m_firmware, hes-339m, soho_wireless_router_firmware, soho_wireless_router, ox-330p_firmware, ox-330p, max218m_firmware, max218m, max218m1w_firmware, max218m1w, max218mw_firmware, max218mw, max308m_fimware, max308m, max318m_firmware, max318m, max338m_firmware, max338m

🛡️What Defenders Should Check

  • Check if you are affected — Review your asset inventory for products listed in CVE-2017-3216.
  • Apply available patches — Visit vendor advisories for the latest security updates.
  • Monitor for exploitation — Check your SIEM/IDS logs for related indicators.

    • Use Vulnios to continuously monitor your exposure to CVE-2017-3216 and similar vulnerabilities.

    References & Sources

  • http://blog.sec-consult.com/2017/06/ghosts-from-past-authentication-bypass.html
  • http://www.kb.cert.org/vuls/id/350135
  • https://sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20170607-0_Various_WiMAX_CPEs_Authentication_Bypass_v10.txt
  • http://blog.sec-consult.com/2017/06/ghosts-from-past-authentication-bypass.html
  • http://www.kb.cert.org/vuls/id/350135
  • https://sec-consult.com/fxdata/seccons/prod/temedia/advisories_txt/20170607-0_Various_WiMAX_CPEs_Authentication_Bypass_v10.txt

    • How Vulnios Detects This

    Vulnios scans for this vulnerability using Trivy and Grype for SBOM-based CVE matching and Vulnios CVE feed continuous monitoring against your asset inventory. Run a scan against your environment to see whether you are exposed; findings are linked back to the original CVE record so triage starts with the patch path already known.

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    Affected Products

    ox350_firmwareox350bm2022_firmwarebm2022hes-309m_firmwarehes-309mhes-319m_firmwarehes-319mhes-319m2w_firmwarehes-319m2w

    Sources

    Related Threat Alerts

    Frequently Asked Questions

    What is CVE-2017-3216?

    CVE-2017-3216 is a critical-severity vulnerability tracked under the Common Vulnerabilities and Exposures program. WiMAX routers based on the MediaTek SDK (libmtk) that use a custom httpd plugin are vulnerable to an authentication bypass allowing a remote, unauthenticated attacker to gain administrator access to t

    Am I affected?

    Check whether your environment runs ox350_firmware, ox350, bm2022_firmware, bm2022, hes-309m_firmware. If you operate any of those, treat yourself as in scope until you have evidence otherwise. A Vulnios scan will identify the exact assets carrying the affected version.

    How urgent is the response?

    Critical: do not wait for your normal patch cycle. Verify exposure today, apply the vendor patch immediately, and add detection rules for any post-exploit indicators.

    How do I remediate?

    Apply the vendor patch listed in the upstream advisory linked under Sources. If the patch is not yet available, follow the vendor-supplied workaround (often a config flag or feature disable) and add detections for the published exploit pattern in your SIEM. Re-scan after the patch lands to confirm the finding clears.

    Where can I track exploitation activity?

    Watch CISA's Known Exploited Vulnerabilities catalog for CVE-2017-3216. Cross-reference with public exploit databases and your own SIEM/IDS for indicator-of-compromise patterns. Vulnios tracks KEV status automatically and surfaces it on the asset findings view.

    How does Vulnios help with this?

    Vulnios continuously cross-references your asset inventory against the live CVE feed (NVD, vendor advisories, CISA KEV, and curated OSINT). When a new CVE matches your environment, you get a prioritized finding with the severity, KEV status, exploit-prediction (EPSS), and a direct path to the vendor patch. You can start a free scan from the homepage.

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