How severe is CVE-2021-27475?

CVE-2021-27475 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-27475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27475?

CVE-2021-27475 affects Rockwellautomation Connected Components Workbench. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27475?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-27475 published?

CVE-2021-27475 was published on 2022-03-23 and last updated on 2026-06-17.

CVE-2021-27475

CVE-2021-27475 is a high-severity vulnerability in Rockwellautomation Connected Components Workbench with a CVSS 3.x base score of 8.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-502.

Key facts

Severity: High (CVSS 3.x base score 8.6)
CVSS v2: 6.8
EPSS exploit prediction: 3% (85th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-502
Affected product: Rockwellautomation Connected Components Workbench
Published: 2022-03-23
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2021-27475?: 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.
How severe is CVE-2021-27475?: CVE-2021-27475 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-27475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (85th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27475?: CVE-2021-27475 affects Rockwellautomation Connected Components Workbench. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27475?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-27475 published?: CVE-2021-27475 was published on 2022-03-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:rockwellautomation:connected_components_workbench:*:*:*:*:*:*:*:*

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