CVE-2021-34578

WAGO: Authentication Vulnerability in Web-Based Management

HIGH
8.1
CVSS Score
Published: August 31, 2021 at 10:33 AM UTC
Updated: June 17, 2026 at 03:56 AM UTC
24 products affected across 1 vendor750-862 Firmware750-823 Firmware750-891 Firmware

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Severity
HIGH8.1
Exploit prediction
EPSS 1.0%

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ fw07
wago-750-362 (same device)
v ≤ fw07
wago-750-363 (same device)
v ≤ fw07
wago-750-823 (same device)
v ≤ fw07
wago-750-832-000-002 (same device)
v ≤ fw07
wago-750-832 (same device)
v ≤ fw07
wago-750-862 (same device)
v ≤ fw07
wago-750-890-025-000 (same device)
v ≤ fw07
wago-750-890-025-001 (same device)
v ≤ fw07
wago-750-890-025-002 (same device)
v ≤ fw07
wago-750-890-040-000 (same device)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRMThird Party Advisory
https://cert.vde.com/en-us/advisories/vde-2020-044

CVSS

Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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