CVE-2017-3216 — WiMAX routers based on the MediaTek SDK (libmtk) that use a custom httpd plugin

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 cra

01What is this vulnerability?

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.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2017-06-20T00:29:00.267
• Last modified: 2026-05-13T00:24:29.033

09References

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