What is CVE-2013-3367?

CVE-2013-3367 is a critical-severity vulnerability in Trendnet Tew-691gr, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-11-13.

How severe is CVE-2013-3367?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Trendnet Tew-691gr

CVE-2013-3367

Undocumented TELNET service in TRENDnet TEW-691GR and TEW-692GR when a web page named backdoor contains an HTML parameter of password and a value of j78G¬DFdg_24Mhw3.

Vulnerability class: Broken Authentication

Published 2019-11-13 · last modified 2026-06-16.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.4th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 85th percentile — 85.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.ise.io/casestudies/exploiting-soho-routers/ (Third Party Advisory, Not Applicable)
www.ise.io/soho_service_hacks/ (Third Party Advisory, Not Applicable)
www.ise.io/wp-content/uploads/2017/07/soho_techreport.pdf (Third Party Advisory)

Frequently asked questions

What is CVE-2013-3367?: CVE-2013-3367 is a critical-severity vulnerability in Trendnet Tew-691gr, classified under Improper Authentication. CVSS score: 9.8/10. Published 2019-11-13.
How severe is CVE-2013-3367?: Critical severity. CVSS v3 base score is 9.8 out of 10.