CVE-2021-34578

Published: Aug 31, 2021Modified: Jun 17, 2026

8.1

Vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.2 / Impact: 5.9

Source: NVD

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 (12)

Products: Wago: 750 890/040 000 Firmware, 750 890/025 001 Firmware, 750 890/025 002 Firmware, 750 890/025 000 Firmware, 750 832/000 002 Firmware, 750 362 Firmware, 750 823 Firmware, 750 832 Firmware, 750 363 Firmware, 750 862 Firmware, 750 891 Firmware, 750 893 Firmware

Wago

12 products

750 890/040 000 Firmware

750 890/025 001 Firmware

750 890/025 002 Firmware

750 890/025 000 Firmware

750 832/000 002 Firmware

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 890/040 000 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 890/040 000	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 890/025 001 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 890/025 001	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 890/025 002 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 890/025 002	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 890/025 000 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 890/025 000	All versions

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 832/000 002 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 832/000 002	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 362 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 362	All versions

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 823 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 823	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 832 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 832	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 363 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 363	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 862 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 862	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 891 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 891	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Wago 750 893 Firmware	Up to fw07

Running on/with	Platform Versions
Wago 750 893	All versions

Related CWEs

CWE-287

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

References (2)

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

Source: info@cert.vde.com

Third Party Advisory

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

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party Advisory

Timeline

No history available yet.