CVE-2020-5806

Name: CVE-2020-5806
Creator: NVD / NIST
Published: 2020-12-29T16:15:14.887+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 4.78%

Last modified Jun 17, 2026

CVE-2020-5806 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An attacker-controlled memory allocation size can be passed to the C++ new operator in the CServerManager::HandleBrowseLoadIconStreamRequest in messaging.dll. This can be done by sending a specially crafted message to 127.0.0.1:7153. EPSS estimates a 4.78% chance of exploitation in the next 30 days.

Description

An attacker-controlled memory allocation size can be passed to the C++ new operator in the CServerManager::HandleBrowseLoadIconStreamRequest in messaging.dll. This can be done by sending a specially crafted message to 127.0.0.1:7153. Observed in FactoryTalk Linx 6.11. All versions of FactoryTalk Linx are affected.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

4.78%

90.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-770

Affected Software

Vendor	Product	Versions
Rockwellautomation	Factorytalk Linx	<= 6.11

References

https://www.tenable.com/security/research/tra-2020-71Third Party Advisory
https://www.tenable.com/security/research/tra-2020-71Third Party Advisory

Timeline

Published: Dec 29, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-5806?

How severe is CVE-2020-5806?

CVE-2020-5806 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 4.78% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5806?

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-2020-5806?

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

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Source: NVD / NIST