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CVE-2021-34578

HIGHCVSS 8.1/10EPSS 0.96%

Last modified

CVE-2021-34578 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.96% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
0.96%

57.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
Wago750-890\/040-000 Firmware<= fw07
Wago750-890\/025-001 Firmware<= fw07
Wago750-890\/025-002 Firmware<= fw07
Wago750-890\/025-000 Firmware<= fw07
Wago750-832\/000-002 Firmware<= fw07
Wago750-362 Firmware<= fw07
Wago750-823 Firmware<= fw07
Wago750-832 Firmware<= fw07
Wago750-363 Firmware<= fw07
Wago750-862 Firmware<= fw07
Wago750-891 Firmware<= fw07
Wago750-893 Firmware<= fw07

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

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.
How severe is CVE-2021-34578?
CVE-2021-34578 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.96% probability of exploitation in the next 30 days.
How do I fix CVE-2021-34578?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-34578?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST