Is CVE-2021-27473 actively exploited?

No active exploitation of CVE-2021-27473 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-27473 be exploited remotely?

No. CVE-2021-27473 requires local access to exploit.

What is the CVSS score of CVE-2021-27473?

CVE-2021-27473 has a CVSS score of 8.2 (HIGH).

HOME VULNERABILITIESCVE-2021-27473

HIGH

CVE-2021-27473

CWE-22Published: March 23, 2022· Updated: Jun 17, 2026

8.2

CVSS v3.1

Official Description

Rockwell Automation Connected Components Workbench v12.00.00 and prior does not sanitize paths specified within the .ccwarc archive file during extraction. This type of vulnerability is also commonly referred to as a Zip Slip. A local, authenticated attacker can create a malicious .ccwarc archive file that, when opened by Connected Components Workbench, will allow the attacker to gain the privileges of the software. If the software is running at SYSTEM level, the attacker will gain admin level privileges. User interaction is required for this exploit to be successful.

NVD Source

Technical Analysis

CVE-2021-27473 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.2.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.