CVE-2021-33539

WEIDMUELLER: WLAN devices affected by authentication bypass vulnerability

HIGH
7.2
CVSS Score
Published: June 25, 2021 at 06:26 PM UTC
Updated: June 17, 2026 at 03:54 AM UTC
16 products affected across 1 vendorIe Wlt Vl AP Br Cl Us FirmwareIe Wlt Bl AP Cl Eu FirmwareIe Wlt Bl AP Cl Us Firmware

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Severity
HIGH7.2
Exploit prediction
EPSS 1%

Description

In Weidmueller Industrial WLAN devices in multiple versions an exploitable authentication bypass vulnerability exists in the hostname processing. A specially configured device hostname can cause the device to interpret selected remote traffic as local traffic, resulting in a bypass of web authentication. An attacker can send authenticated SNMP requests to trigger this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wl-bl-ap-cl-eu (same device)
v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wl-bl-ap-cl-us (same device)
v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wl-vl-ap-br-cl-eu (same device)
v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wl-vl-ap-br-cl-us (same device)
v ≤ 1.16.18v ≤ v1.11.10
weidmueller-ie-wlt-bl-ap-cl-eu (same device)
v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wlt-bl-ap-cl-us (same device)
v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wlt-vl-ap-br-cl-eu (same device)
v ≤ 1.11.10v ≤ 1.16.18
weidmueller-ie-wlt-vl-ap-br-cl-us (same device)
All versions
All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (1)

x_refsource_CONFIRMThird Party Advisory
https://cert.vde.com/en-us/advisories/vde-2021-026

CVSS

7.2HIGHCERTVDE
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-287

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