What is CVE-2021-34578?

CVE-2021-34578 is a critical-severity vulnerability in Wago 750-362, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-08-31.

How severe is CVE-2021-34578?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Wago 750-362

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.

Vulnerability class: Broken Authentication

EPSS: 0.010 (57.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Wago 750-362
Wago 750-362_firmware
Wago 750-363
Wago 750-363_firmware
Wago 750-823
Wago 750-823_firmware
Wago 750-832
Wago 750-832\/000-002
Wago 750-832\/000-002_firmware
Wago 750-832_firmware

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

info@cert.vde.com (x_refsource_CONFIRM, Third Party Advisory)

Frequently asked questions

What is CVE-2021-34578?: CVE-2021-34578 is a critical-severity vulnerability in Wago 750-362, classified under Improper Authentication. CVSS score: 9.8/10. Published 2021-08-31.
How severe is CVE-2021-34578?: Critical severity. CVSS v3 base score is 9.8 out of 10.