What is CVE-2020-35755?

CVE-2020-35755 is a high-severity vulnerability in Librewireless Ls9, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2021-05-03.

How severe is CVE-2020-35755?

High severity. CVSS v3 base score is 7.5 out of 10.

Auth bypass in Librewireless Ls9

CVE-2020-35755

An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices. There is a luci_service Read_ NVRAM Direct Access Information Leak. The luci_service deamon running on port 7777 provides a sub-category of commands for which Read_ is prepended. Commands in this category are able to directly read the contents of the device configuration NVRAM. The NVRAM contains sensitive information, such as the Wi-Fi password (in cleartext), as well as connected account tokens for services such as Spotify.

Vulnerability class: Broken Authentication

Published 2021-05-03 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.011 (64.8th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 65th percentile — 64.8% 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

Librewireless Ls9
Librewireless Ls9 Firmware — versions 7040

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

www.iot-inspector.com/blog/advisory-multiple-issues-libre-wireless-ls9/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2020-35755?: CVE-2020-35755 is a high-severity vulnerability in Librewireless Ls9, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2021-05-03.
How severe is CVE-2020-35755?: High severity. CVSS v3 base score is 7.5 out of 10.