CVE-2021-34578

WAGO: Authentication Vulnerability in Web-Based Management

Published Aug 31, 2021 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.

Remediation

Vendor Solution

Update the device to the latest FW version.


Vendor Workaround

Restrict network access to the device. Do not directly connect the device to the internet. Disable unused TCP/UDP ports. Disable web-based management ports 80/443 after the configuration phase

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2021-21228 This vulnerability allows an attacker who has access to the WBM to read and write settings-parameters of the device by sending specifically constructed requests without authentication on multiple WAGO PLCs in firmware versions up to FW07.
History

No history.