9.8

CVE-2021-34578: wago 750-362_firmware Improper Authentication

CVSS: 9.8v3.1CriticalModified
Published 31-08-2021Last modified 16-09-2024
Open JSON

Vulnerability summary

CVE-2021-34578 is a critical (CVSS 9.8) Improper Authentication vulnerability in wago 750-362_firmware. EPSS estimates a 0.96% chance of exploitation in the next 30 days, higher than 61% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.96%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 31-08-2021
    PublishedVulnerability first disclosed.
  2. 16-09-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

3 scores · 2 sources · 2 versions

EPSS trend

Probability

0.96%

Chance of exploitation in the next 30 days

Percentile

61%

Versus all other CVEs

30-day change

0.00 pp

From 0.96% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.96%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Wago13 products

1 vendor · 13 products

References

1 links