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Vulnerability record · CVE-2021-27475 · published 23 March 2022

CVE-2021-27475: Rockwellautomation connected components workbench deserialization of untrusted data vulnerability

Rockwellautomation · Connected Components Workbench

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.

8.6 CVSS 3.1 High EPSS 3.0% · top 13.2% CWE-502 · Deserialization of untrusted data
8.6CVSS 3.1 base score, v2 6.8
3.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

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.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2021-27475), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.