WAGO: Authentication Vulnerability in Web-Based Management
CVE-2021-34578

9.8CRITICAL

Key Information:

Vendor

Wago

Status
Plc
Vendor
CVE Published:
31 August 2021

What is CVE-2021-34578?

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.

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Deploy the Patch

Affected Version(s)

PLC 750-362

PLC 750-363

PLC 750-823

References

https://cert.vde.com/en-us/advisories/vde-2020-044
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Maxim Rupp (https://rupp.it) reported this vulnerability to WAGO. CERT@VDE coordinated.
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