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Status published
Critical
CVE-2021-34578
WAGO: Authentication Vulnerability in Web-Based Management
Vulnerability 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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Maxim Rupp (https://rupp.it) reported this vulnerability to WAGO. CERT@VDE coordinated.
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Affected Vendor
WAGO
View all reports →Affected Software
PLC
Vulnerable Versions:
750-362, 750-363, 750-823, 750-832/xxx-xxx, 750-862, 750-891, 750-890/xxx-xxx, 750-893
Timeline
Official Publish:
August 31st, 2021
Last Modified:
September 16th, 2024
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H