Security readout for executives and security teams
Plain-English summary
CVE-2021-33528 affects specific Weidmüller Industrial WLAN devices. A logged-in low-privilege user can abuse the restricted console to gain root-level system access. For businesses, the concern is loss of control over industrial wireless infrastructure, with potential impact to confidentiality, integrity, and availability.
Executive priority
Treat this as high priority for industrial networks using the affected WLAN devices. The attack requires authentication, but successful exploitation can hand over root-level control of infrastructure equipment.
Technical view
The flaw is in iw_console functionality. A specially crafted menu selection string can escape the restricted console and grant root system access. The CVSS 3.1 score is 8.8, with network attack vector, low complexity, low privileges required, and no user interaction.
Likely exposure
Exposure is likely limited to deployments of the named Weidmüller IE-WL(T)-BL-AP-CL-XX and IE-WL(T)-VL-AP-CL-XX variants where low-privilege authenticated access is possible.
Exploitation context
The provided sources describe an exploitable privilege escalation path for authenticated low-privilege users. They do not state public exploitation in the wild, and this CVE is not marked as CISA KEV in the bundle.
Researcher notes
The source bundle identifies CWE-710, but the operational detail is restricted-console escape through iw_console. Evidence is sufficient for exposure triage, but patch availability and exploit telemetry are not provided in the bundle.
Mitigation direction
- Check Weidmüller and VDE advisory guidance for firmware updates or official mitigations.
- Inventory the named device variants and confirm deployed part numbers.
- Restrict administrative and console access to trusted management networks only.
- Remove unnecessary low-privilege accounts from affected devices.
- Monitor device access logs for unusual authenticated console activity.
Validation and detection
- Match deployed devices against the affected product and part-number lists.
- Confirm whether any low-privilege users can authenticate to affected device consoles.
- Verify management interfaces are not reachable from untrusted networks.
- Review vendor advisory status before declaring remediation complete.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-710: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupPrivilege behavior lookup
The CVE wording references privilege impact, so privilege escalation and authorization behavior review may help. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2021-33528 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.8 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H2.85.9Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.8HighVector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://cert.vde.com/en-us/advisories/vde-2021-026CVE reference · x_refsource_CONFIRM
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Improper Adherence to Coding Standards
Improper Adherence to Coding Standards represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.