Security readout for executives and security teams
Plain-English summary
This vulnerability can temporarily freeze Schneider Electric Magelis HMI panels if they receive a high rate of network frames. For executives, the concern is operational availability: operators may temporarily lose normal HMI responsiveness, and queued commands may execute after the traffic stops.
Executive priority
Treat this as a moderate OT availability risk. It does not report data theft or command tampering, but HMI freezes can disrupt operator visibility and plant workflows. Prioritize exposed or safety-relevant HMI networks first.
Technical view
CVE-2019-6833 is a CWE-754 improper handling issue in multiple Magelis HMI panel families. The CVSS 3.1 score is 6.5, with network access, low attack complexity, no privileges, user interaction required, and high availability impact. Confidentiality and integrity impacts are not reported.
Likely exposure
Exposure is likely limited to organizations using the listed Schneider Electric Magelis HMI families: HMIGTO, HMISTO, XBTGH, HMIGTU, HMIGTUX, HMISCU, HMISTU, XBTGT, HMIGXO, or HMIGXU. The source states all versions of those families are affected.
Exploitation context
The provided bundle does not indicate active exploitation, and KEV status is false. The described condition involves a high rate of frames causing a temporary freeze; when traffic stops, buffered commands are processed. No exploit details are provided here.
Researcher notes
The key uncertainty is remediation detail: the source bundle identifies the advisory but does not include patch or workaround specifics. Validation should focus on asset matching, reachability, advisory review, and safe operational testing boundaries.
Mitigation direction
- Review Schneider Electric advisory SEVD-2019-225-01 for product-specific remediation guidance.
- Inventory all Magelis HMI panel models and versions in operational environments.
- Reduce untrusted network reachability to affected HMI panels where operationally feasible.
- Use OT change control before applying any vendor remediation or compensating control.
- Monitor affected HMI networks for abnormal high-rate frame activity.
Validation and detection
- Confirm whether deployed panels match the affected Magelis model families.
- Check Schneider advisory status for each deployed model and version.
- Review network paths that can reach affected HMI panels.
- Assess monitoring for abnormal traffic rates near HMI network segments.
- Avoid stress testing production HMIs without vendor-approved procedures.
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
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ATT&CK lookup starting points
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CWE-754: Exact CWE lookup
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Open ATT&CK lookupCVE-2019-6833 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
- Medium
- CVSS
- 6.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/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:R/S:U/C:N/I:N/A:H2.83.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.5MediumVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://www.schneider-electric.com/ww/en/download/document/SEVD-2019-225-01CVE reference · x_refsource_CONFIRM
- https://security.cse.iitk.ac.in/responsible-disclosureCVE reference · x_refsource_MISC
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 Check for Unusual or Exceptional Conditions
Improper Check for Unusual or Exceptional Conditions represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.