Security readout for executives and security teams
Plain-English summary
Certain Weidmüller industrial WLAN devices include hard-coded cryptographic keys. If an attacker captures network traffic to or from an affected device, the issue may allow that traffic to be decrypted, creating a confidentiality risk for industrial communications.
Executive priority
Treat this as a high-priority confidentiality issue for industrial networks using the affected devices. Prioritize inventory and vendor-guided remediation, especially in environments carrying sensitive operational or security-relevant traffic.
Technical view
CVE-2021-33529 is a CWE-798 hard-coded credentials issue in the service agent binary of listed Weidmüller IE-WL(T) BL/VL AP-CL devices. The CVSS 3.1 score is 7.5, with network attack vector, low complexity, no privileges, no user interaction, and high confidentiality impact only.
Likely exposure
Exposure is limited to organizations using the specific Weidmüller industrial WLAN device models and product codes listed in the advisory. Risk is highest where traffic to or from these devices can be captured on reachable industrial or wireless networks.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked as CISA KEV. The described impact is decryption of captured traffic, not code execution, data modification, or service disruption.
Researcher notes
Evidence in the bundle identifies the root issue and affected product codes, but does not provide patch status or detailed vendor mitigation text. Avoid assuming broader Weidmüller product impact beyond the listed devices.
Mitigation direction
- Identify whether listed Weidmüller device models and product codes are deployed.
- Review VDE-2021-026 and Weidmüller guidance for approved remediation or replacement options.
- Reduce unnecessary network exposure for affected industrial WLAN devices.
- Avoid sending sensitive operational data through affected devices until remediated.
- Monitor vendor advisories for firmware or lifecycle guidance.
Validation and detection
- Inventory Weidmüller industrial WLAN devices by exact model and product code.
- Confirm whether deployed devices match the affected IE-WL(T)-BL or IE-WL(T)-VL variants.
- Review network paths where traffic to or from affected devices may be captured.
- Check change records for any vendor-approved remediation already applied.
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-798: Credential and account abuse lookup
Authentication and credential weaknesses can make valid-account abuse and credential telemetry useful review starting points. 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 lookupCVE-2021-33529 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
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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:N/UI:N/S:U/C:H/I:N/A:N3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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.
Use of Hard-coded Credentials
Use of Hard-coded Credentials represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.