CVE intelligence and bounded remediation

CVE-2021-33538 — Weidmueller Ie-Wl-Bl-Ap-Cl-Eu Firmware security vulnerability

High CVSS 9

In Weidmueller Industrial WLAN devices in multiple versions an exploitable improper access control vulnerability exists in the iw_webs account settings functionality. A specially crafted user name entry can cause the overwrite of an existing user account password, resulting in remote shell access to the device as that user. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.

Severity
High
CVSS
9 (2.0)
Published
2021-06-25
CISA KEV
Not currently listed
Ecosystem
operating-system
Weaknesses
CWE-269

Affected products

  • weidmueller / ie-wl-bl-ap-cl-eu_firmware
  • weidmueller / ie-wlt-bl-ap-cl-eu_firmware
  • weidmueller / ie-wl-bl-ap-cl-us_firmware
  • weidmueller / ie-wlt-bl-ap-cl-us_firmware
  • weidmueller / ie-wl-vl-ap-br-cl-eu_firmware
  • weidmueller / ie-wlt-vl-ap-br-cl-eu_firmware

Showing 6 representative product identities from 16 source matches. Confirm exact affected versions with the linked vendor and NVD evidence.

Matched remediation archetype

Privilege escalation and unsafe privilege management

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Check exposure

  • Map service accounts, operating-system identities, roles, capabilities, impersonation, set-user transitions, and administrative helper paths.
  • Determine whether untrusted users or lower-privilege processes can reach the affected transition or modify inputs it trusts.
  • Review file, socket, registry, device, job, container, and cloud-role permissions used before and after privilege changes.

Remediate safely

  • Apply the supported fix and redesign privileged operations as a minimal, authenticated, allowlisted interface.
  • Drop privileges before processing untrusted input, verify the drop succeeds, and remove unnecessary roles, capabilities, and write permissions.
  • Validate ownership and permissions at time of use and add explicit lower-to-higher privilege boundary tests.

Authoritative sources

Complete CVE record and remediation plan

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