How severe is CVE-2020-35755?

CVE-2020-35755 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-35755 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-35755?

CVE-2020-35755 affects Librewireless Ls9 Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-35755?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2020-35755 published?

CVE-2020-35755 was published on 2021-05-03 and last updated on 2026-06-17.

CVE-2020-35755

CVE-2020-35755 is a high-severity vulnerability in Librewireless Ls9 Firmware with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-306.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-306
Affected product: Librewireless Ls9 Firmware
Published: 2021-05-03
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2020-35755?: CVE-2020-35755 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-35755 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-35755?: CVE-2020-35755 affects Librewireless Ls9 Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-35755?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-35755 published?: CVE-2020-35755 was published on 2021-05-03 and last updated on 2026-06-17.

References

https://www.iot-inspector.com/blog/advisory-multiple-issues-libre-wireless-ls9/

Affected products (1)

cpe:2.3:o:librewireless:ls9_firmware:7040:*:*:*:*:*:*:*

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CVE-2020-35758 — Critical (CVSS 9.8): An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices. There is a Authentication Bypass in the Web…
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