CVE-2020-5801

Name: CVE-2020-5801
Creator: NVD / NIST
Published: 2020-12-29T16:15:14.73+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 25.22%

Last modified Jun 17, 2026

CVE-2020-5801 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDManager::HandleRequest function in RnaDaSvr.dll, resulting in process termination. Observed in FactoryTalk Linx 6.11. EPSS estimates a 25.22% chance of exploitation in the next 30 days.

Description

An attacker can craft and send an OpenNamespace message to port 4241 with valid session-id that triggers an unhandled exception in CFTLDManager::HandleRequest function in RnaDaSvr.dll, resulting in process termination. Observed in FactoryTalk Linx 6.11. All versions of FactoryTalk Linx are affected.

Metrics

CVSS 3.1

7.5/10

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

EPSS Probability

25.22%

97.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-755

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-2020-5801?

How severe is CVE-2020-5801?

CVE-2020-5801 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 25.22% probability of exploitation in the next 30 days.

How do I fix CVE-2020-5801?

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-2020-5801?

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

Scan your code now

Source: NVD / NIST