Security readout for executives and security teams
Plain-English summary
Certain WAGO 750-8XX controllers running FW07 or older may allow unauthenticated changes to special parameters through web-based authentication weaknesses. For executives, the main concern is operational disruption: the CVSS rating shows high availability impact, even though confidentiality impact is not indicated.
Executive priority
Treat as high priority for OT environments using affected WAGO controllers. Prioritize discovery, exposure reduction, and vendor-guided remediation because unauthorized parameter changes could disrupt industrial operations.
Technical view
CVE-2020-12505 is CWE-306 Improper Authentication affecting listed WAGO 750-8XX series devices on FW07 and below. It is network-reachable, low complexity, requires no privileges or user interaction, and can permit unauthenticated parameter changes. CVSS v3.1 score is 8.2 high.
Likely exposure
Organizations using the listed WAGO 750-8XX controllers with FW07 or older firmware are potentially exposed, especially if device web interfaces are reachable from untrusted, enterprise, remote-access, or internet-connected networks.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked as CISA KEV. Risk remains meaningful because the weakness is remotely reachable without authentication and has high stated availability impact.
Researcher notes
Evidence is sufficient for affected model families, version boundary, weakness class, and CVSS impact. The provided bundle does not include exploit evidence, detailed parameter scope, or a named patch version, so avoid assumptions beyond vendor guidance.
Mitigation direction
- Identify affected WAGO 750-8XX models in OT asset inventories.
- Confirm firmware versions and prioritize FW07 or older devices.
- Review the WAGO/VDE advisory for vendor-approved updates or mitigations.
- Restrict web management access to trusted administrative networks.
- Monitor for unexpected parameter changes on affected controllers.
Validation and detection
- Inventory devices matching the affected WAGO model list.
- Verify each device firmware version against the FW07-and-below condition.
- Confirm whether web management interfaces are reachable across network boundaries.
- Review configuration baselines for unauthorized parameter changes.
- Track remediation status against the vendor advisory.
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-306: 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-2020-12505 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
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/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:N/UI:N/S:U/C:N/I:L/A:H3.94.2Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://cert.vde.com/en-us/advisories/vde-2020-027CVE 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.