CVE-2020-35757

Name: CVE-2020-35757
Creator: NVD / NIST
Published: 2021-05-03T21:15:07.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 1.81%

Last modified Jun 17, 2026

CVE-2020-35757 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices. There is Unauthenticated Root ADB Access Over TCP. EPSS estimates a 1.81% chance of exploitation in the next 30 days.

Description

An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices. There is Unauthenticated Root ADB Access Over TCP. The LS9 web interface provides functionality to access ADB over TCP. This is not enabled by default, but can be enabled by sending a crafted request to a web management interface endpoint. Requests made to this endpoint do not require authentication. As such, any unauthenticated user who is able to access the web interface will be able to gain root privileges on the LS9 module.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

1.81%

75.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-306

Affected Software

Vendor	Product	Versions
Librewireless	Ls9 Firmware	7040

References

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

Timeline

Published: May 3, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-35757?

How severe is CVE-2020-35757?

CVE-2020-35757 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.81% probability of exploitation in the next 30 days.

How do I fix CVE-2020-35757?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-35757?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST