CVE-2021-27475

Name: CVE-2021-27475
Creator: NVD / NIST
Published: 2022-03-23T20:15:09.27+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.6/10EPSS 2.81%

Last modified Jun 17, 2026

CVE-2021-27475 is a high-severity vulnerability rated 8.6/10 on the CVSS scale. Rockwell Automation Connected Components Workbench v12.00.00 and prior does not limit the objects that can be deserialized. This vulnerability allows attackers to craft a malicious serialized object that, if opened by a local user in Connected Components Workbench, may result in remote code execution. EPSS estimates a 2.81% chance of exploitation in the next 30 days.

Description

Rockwell Automation Connected Components Workbench v12.00.00 and prior does not limit the objects that can be deserialized. This vulnerability allows attackers to craft a malicious serialized object that, if opened by a local user in Connected Components Workbench, may result in remote code execution. This vulnerability requires user interaction to be successfully exploited.

Metrics

CVSS 3.1

8.6/10

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

EPSS Probability

2.81%

84.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Rockwellautomation	Connected Components Workbench	<= 12.00.00

References

https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1131435Permissions Required, Vendor Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-133-01Third Party Advisory, US Government Resource
https://rockwellautomation.custhelp.com/app/answers/answer_view/a_id/1131435Permissions Required, Vendor Advisory
https://www.cisa.gov/uscert/ics/advisories/icsa-21-133-01Third Party Advisory, US Government Resource

Timeline

Published: Mar 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27475?

How severe is CVE-2021-27475?

CVE-2021-27475 has a CVSS score of 8.6/10 (HIGH severity). The EPSS model estimates a 2.81% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27475?

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-2021-27475?

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

Scan your code now

Source: NVD / NIST