How severe is CVE-2021-33528?

CVE-2021-33528 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-33528 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33528?

CVE-2021-33528 primarily affects Weidmueller Ie-wl-bl-ap-cl-eu Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-33528?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-33528 published?

CVE-2021-33528 was published on 2021-06-25 and last updated on 2026-06-17.

CVE-2021-33528

CVE-2021-33528 is a high-severity vulnerability in Weidmueller Ie-wl-bl-ap-cl-eu Firmware with a CVSS 3.x base score of 8.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-710.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 9.0
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-710
Affected product: Weidmueller Ie-wl-bl-ap-cl-eu Firmware
Published: 2021-06-25
Last modified: 2026-06-17

Description

In Weidmueller Industrial WLAN devices in multiple versions an exploitable privilege escalation vulnerability exists in the iw_console functionality. A specially crafted menu selection string can cause an escape from the restricted console, resulting in system access as the root user. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.

Frequently asked questions

What is CVE-2021-33528?: In Weidmueller Industrial WLAN devices in multiple versions an exploitable privilege escalation vulnerability exists in the iw_console functionality. A specially crafted menu selection string can cause an escape from the restricted console, resulting in system access as the root user. An attacker can send commands while authenticated as a low privilege user to trigger this vulnerability.
How severe is CVE-2021-33528?: CVE-2021-33528 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-33528 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33528?: CVE-2021-33528 primarily affects Weidmueller Ie-wl-bl-ap-cl-eu Firmware. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-33528?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-33528 published?: CVE-2021-33528 was published on 2021-06-25 and last updated on 2026-06-17.

References

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

Affected products (8)

cpe:2.3:o:weidmueller:ie-wl-bl-ap-cl-eu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wlt-bl-ap-cl-eu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wl-bl-ap-cl-us_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wlt-bl-ap-cl-us_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wl-vl-ap-br-cl-eu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wlt-vl-ap-br-cl-eu_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wl-vl-ap-br-cl-us_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:weidmueller:ie-wlt-vl-ap-br-cl-us_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Weidmueller Ie-wl-bl-ap-cl-eu Firmware

CVE-2021-33538 — High (CVSS 8.8): In Weidmueller Industrial WLAN devices in multiple versions an exploitable improper access control vulnerability exists…
CVE-2021-33537 — High (CVSS 8.8): In Weidmueller Industrial WLAN devices in multiple versions an exploitable remote code execution vulnerability exists…
CVE-2021-33535 — High (CVSS 8.8): In Weidmueller Industrial WLAN devices in multiple versions an exploitable format string vulnerability exists in the…
CVE-2021-33533 — High (CVSS 8.8): In Weidmueller Industrial WLAN devices in multiple versions an exploitable command injection vulnerability exists in…
CVE-2021-33532 — High (CVSS 8.8): In Weidmueller Industrial WLAN devices in multiple versions an exploitable command injection vulnerability exists in…
CVE-2021-33531 — High (CVSS 8.8): In Weidmueller Industrial WLAN devices in multiple versions an exploitable use of hard-coded credentials vulnerability…

All CVEs affecting Weidmueller Ie-wl-bl-ap-cl-eu Firmware →

Other CWE-710 vulnerabilities

CVE-2020-1613 — High (CVSS 8.6): A vulnerability in the BGP FlowSpec implementation may cause a Juniper Networks Junos OS device to terminate an…
CVE-2021-27501 — High (CVSS 7.5): Philips Vue PACS versions 12.2.x.x and prior does not follow certain coding rules for development, which can lead to…
CVE-2025-0007 — Medium (CVSS 5.7): Insufficient validation within Xilinx Run Time framework could allow a local attacker to escalate privileges from user…

Browse all CWE-710 vulnerabilities →