What is CVE-2021-33529?

CVE-2021-33529 is a high-severity vulnerability in Weidmueller Ie-Wl-Bl-Ap-Cl-Eu, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2021-06-25.

How severe is CVE-2021-33529?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2021-33529 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Weidmueller Ie-Wl-Bl-Ap-Cl-Eu

CVE-2021-33529

In Weidmueller Industrial WLAN devices in multiple versions the usage of hard-coded cryptographic keys within the service agent binary allows for the decryption of captured traffic across the network from or to the device.

Published 2021-06-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.009 (60.4th percentile), scored 2026-10-25.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-798 — Use of Hard-coded Credentials

Public proof-of-concept exploits

n0-traces/cve_

References

cert.vde.com/en-us/advisories/vde-2021-026 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-33529?: CVE-2021-33529 is a high-severity vulnerability in Weidmueller Ie-Wl-Bl-Ap-Cl-Eu, classified under Use of Hard-coded Credentials. CVSS score: 7.5/10. Published 2021-06-25.
How severe is CVE-2021-33529?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2021-33529 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.