Is CVE-2020-4060 actively exploited?

No active exploitation of CVE-2020-4060 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-4060 be exploited remotely?

Yes. CVE-2020-4060 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-4060?

CVE-2020-4060 has a CVSS score of 5.0 (MEDIUM).

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MEDIUM

CVE-2020-4060

CWE-416Published: June 22, 2020· Updated: Jun 17, 2026

5.0

CVSS v3.1

Official Description

In LoRa Basics Station before 2.0.4, there is a Use After Free vulnerability that leads to memory corruption. This bug is triggered on 32-bit machines when the CUPS server responds with a message (https://doc.sm.tc/station/cupsproto.html#http-post-response) where the signature length is larger than 2 GByte (never happens in practice), or the response is crafted specifically to trigger this issue (i.e. the length signature field indicates a value larger than (2**31)-1 although the signature actually does not contain that much data). In such a scenario, on 32 bit machines, Basic Station would execute a code path, where a piece of memory is accessed after it has been freed, causing the process to crash and restarted again. The CUPS transaction is typically mutually authenticated over TLS. Therefore, in order to trigger this vulnerability, the attacker would have to gain access to the CUPS server first. If the user chose to operate without authentication over TLS but yet is concerned about this vulnerability, one possible workaround is to enable TLS authentication. This has been fixed in 2.0.4.

NVD Source

Technical Analysis

CVE-2020-4060 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.

From a weakness classification perspective (CWE-416): Use-after-free vulnerabilities involve accessing memory after it has been freed, often enabling arbitrary code execution.