Security readout for executives and security teams
Plain-English summary
CVE-2019-19957 is an out-of-bounds read in libIEC61850 1.4.0, a library used for IEC 61850/MMS communications. Business risk depends on whether this library is embedded in deployed OT or energy-sector products. The source bundle does not provide severity, CVSS, a vendor fix, or evidence of active exploitation.
Executive priority
Prioritize identification over emergency response. This is relevant for OT environments, but the provided evidence lacks severity, exploit status, and fix details. Escalate if libIEC61850 1.4.0 is found in internet-exposed or safety-critical systems.
Technical view
The CVE describes getNumberOfElements in mms/iso_mms/server/mms_access_result.c reading outside intended bounds, related to bufPos and elementLength. The available metadata names libIEC61850 1.4.0 but has incomplete affected-product records and no CWE, CVSS, or remediation details in the provided sources.
Likely exposure
Exposure is most likely where software, firmware, gateways, simulators, or OT products embed libIEC61850 1.4.0 and process IEC 61850/MMS data. The source bundle does not identify downstream affected products, so exposure requires asset, SBOM, source, or vendor confirmation.
Exploitation context
The provided sources do not show CISA KEV listing, active exploitation, exploit availability, or real-world incidents. Treat exploitability as unconfirmed from this bundle. The bug class may affect availability or memory safety, but impact cannot be reliably rated without vendor analysis.
Researcher notes
Key gaps are severity, exact vulnerable call path, reachable inputs, downstream products, and fixed version. The GitHub issue is the primary technical reference in the bundle. Avoid assuming exploitability beyond the stated out-of-bounds read until vendor or code-level evidence confirms it.
Mitigation direction
- Inventory systems and products that embed libIEC61850 1.4.0.
- Check mz-automation and product-vendor guidance for fixed releases or patches.
- Upgrade or apply vendor-approved fixes when available.
- Restrict IEC 61850/MMS service exposure to trusted OT networks.
- Monitor affected systems for crashes or abnormal MMS traffic.
Validation and detection
- Search SBOMs, firmware manifests, and source trees for libIEC61850 1.4.0.
- Ask vendors whether their products embed the vulnerable library version.
- Confirm whether exposed systems process IEC 61850/MMS traffic.
- Verify any applied fix against vendor release notes or advisory text.
- Review network segmentation for access to affected MMS services.
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.
CVE-2019-19957 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
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
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 and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/mz-automation/libiec61850/issues/197CVE 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.