CVE-2020-27251

Name: CVE-2020-27251
Creator: NVD / NIST
Published: 2020-11-26T02:15:12.01+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 5.46%

Last modified Jun 17, 2026

CVE-2020-27251 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A heap overflow vulnerability exists within FactoryTalk Linx Version 6.11 and prior. This vulnerability could allow a remote, unauthenticated attacker to send malicious port ranges, which could result in remote code execution.. EPSS estimates a 5.46% chance of exploitation in the next 30 days.

Description

A heap overflow vulnerability exists within FactoryTalk Linx Version 6.11 and prior. This vulnerability could allow a remote, unauthenticated attacker to send malicious port ranges, which could result in remote code execution.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

5.46%

91.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-122

Affected Software

Vendor	Product	Versions
Rockwellautomation	Factorytalk Linx	<= 6.11

References

https://us-cert.cisa.gov/ics/advisories/icsa-20-329-01Third Party Advisory, US Government Resource
https://us-cert.cisa.gov/ics/advisories/icsa-20-329-01Third Party Advisory, US Government Resource

Timeline

Published: Nov 26, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-27251?

How severe is CVE-2020-27251?

CVE-2020-27251 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 5.46% probability of exploitation in the next 30 days.

How do I fix CVE-2020-27251?

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-2020-27251?

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

Scan your code now

Source: NVD / NIST