Is CVE-2020-5802 actively exploited?

No active exploitation of CVE-2020-5802 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-5802 be exploited remotely?

Yes. CVE-2020-5802 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-5802?

CVE-2020-5802 has a CVSS score of 7.5 (HIGH).

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HIGH

CVE-2020-5802

CWE-770Published: December 29, 2020· Updated: Jun 17, 2026

7.5

CVSS v3.1

Official Description

An attacker-controlled memory allocation size can be passed to the C++ new operator in RnaDaSvr.dll by sending a specially crafted ConfigureItems message to TCP port 4241. This will cause an unhandled exception, resulting in termination of RSLinxNG.exe. Observed in FactoryTalk 6.11. All versions of FactoryTalk Linx are affected.

NVD Source

Technical Analysis

CVE-2020-5802 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in availability disruption (denial of service), with a CVSS base score of 7.5.