CVE-2021-33531: Weidmueller Ie-Wl-Bl-Ap-Cl-Eu Firmware

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

In Weidmueller Industrial WLAN devices in multiple versions an exploitable use of hard-coded credentials vulnerability exists in multiple iw_* utilities. The device operating system contains an undocumented encryption password, allowing for the creation of custom diagnostic scripts. An attacker can send diagnostic scripts while authenticated as a low privilege user to trigger this vulnerability.

Affected products

• Weidmueller Ie-Wl-Bl-Ap-Cl-Eu Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wl-Bl-Ap-Cl-Us Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wl-Vl-Ap-Br-Cl-Eu Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wl-Vl-Ap-Br-Cl-Us Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wlt-Bl-Ap-Cl-Eu Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wlt-Bl-Ap-Cl-Us Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wlt-Vl-Ap-Br-Cl-Eu Firmware: up to and including 1.16.18; up to and including 1.11.10
• Weidmueller Ie-Wlt-Vl-Ap-Br-Cl-Us Firmware: up to and including 1.16.18; up to and including 1.11.10

Published 2021-06-25. Last modified 2026-06-17.