CVE-2021-33539 json
WEIDMUELLER: WLAN devices affected by authentication bypass vulnerability
published 2021-06-25 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-20231
- cvss
- 7.2
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.1%
- EPSS 1.1% chance of exploitation in 30 days, percentile 64%
- public exploits
- 0
- none known
Summary
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.
Exploit prediction
1.06% chance of exploitation in the next 30 days, higher than 64% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 7.2 | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 6.5 | AV:N/AC:L/Au:S/C:P/I:P/A:P |
Affected products
- Weidmüller IE-WL(T)-BL-AP-CL-XX
- Weidmüller IE-WL(T)-VL-AP-CL-XX
Classification
- Weakness
-
- CWE-287 Improper Authentication
References
-
cert.vde.com
/en-us/advisories/vde-2021-026
third-party-advisory
Sources
- CVE List CVE-2021-33539
- NVD CVE-2021-33539
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