What is CVE-2017-17743?

CVE-2017-17743 is a medium-severity vulnerability in Ucopia Wireless Appliance, classified under Improper Authentication. CVSS score: 6.7/10. Published 2018-03-22.

How severe is CVE-2017-17743?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Auth bypass in Ucopia Wireless Appliance

CVE-2017-17743

Improper input sanitization within the restricted administration shell on UCOPIA Wireless Appliance devices before 4.4.20, 5.0.x before 5.0.19, and 5.1.x before 5.1.11 allows authenticated remote attackers to escape the shell and escalate their privileges by uploading a .bashrc file containing the /bin/sh string. In some situations, authentication can be achieved via the bhu85tgb default password for the admin account.

Vulnerability class: Broken Authentication

Published 2018-03-22 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.011 (64.0th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

securite.intrinsec.com/2018/03/19/cve-2017-17743-ucopia-shell-escape/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2017-17743?: CVE-2017-17743 is a medium-severity vulnerability in Ucopia Wireless Appliance, classified under Improper Authentication. CVSS score: 6.7/10. Published 2018-03-22.
How severe is CVE-2017-17743?: Medium severity. CVSS v3 base score is 6.7 out of 10.