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CVE Record

CVE-2019-14463: An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5.

An issue was discovered in libmodbus before 3.0.7 and 3.1.x before 3.1.5. There is an out-of-bounds read for the MODBUS_FC_WRITE_MULTIPLE_REGISTERS case, aka VD-1301.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysisunknown

Security readout for executives and security teams

Plain-English summary

CVE-2019-14463 affects older libmodbus versions. A malformed write-multiple-registers request can make the library read outside expected memory bounds. The supplied sources do not quantify severity, business impact, or confirmed exploitation, so urgency depends on whether exposed systems process untrusted Modbus traffic.

Executive priority

Prioritize based on exposure, not headline severity. Internet- or partner-reachable Modbus processing should be reviewed promptly. Internal-only systems should still be patched through normal security maintenance because downstream vendors issued updates.

Technical view

libmodbus before 3.0.7 and 3.1.x before 3.1.5 has an out-of-bounds read in MODBUS_FC_WRITE_MULTIPLE_REGISTERS, also referenced as VD-1301. Fixed releases and downstream Fedora and Debian security updates are cited. No CVSS, CWE, or KEV evidence is supplied.

Likely exposure

Exposure is most likely in applications, services, gateways, or industrial/operational systems embedding libmodbus versions earlier than 3.0.7 or 3.1.5. Package-managed Fedora and Debian LTS environments may have received vendor updates. The source bundle does not identify specific appliances or products.

Exploitation context

The supplied sources do not show active exploitation, public exploit use, or CISA KEV listing. The vulnerable code path involves handling MODBUS_FC_WRITE_MULTIPLE_REGISTERS traffic, so practical risk is higher where affected libmodbus instances process untrusted or reachable Modbus requests.

Researcher notes

Evidence is limited to the CVE description, upstream commit/release references, and Fedora/Debian advisories. The record lacks CVSS, CWE, affected CPEs, and exploit confirmation. Avoid assuming impact beyond an out-of-bounds read unless vendor-specific analysis supports it.

Mitigation direction

  • Upgrade libmodbus to 3.0.7, 3.1.5, or a later vendor-supported release.
  • Apply relevant Fedora or Debian security updates where libmodbus is installed from packages.
  • Ask appliance or application vendors whether they embed affected libmodbus versions.
  • Restrict Modbus-facing services to trusted networks while update status is confirmed.

Validation and detection

  • Inventory hosts, containers, firmware, and applications that include libmodbus.
  • Verify installed libmodbus versions are 3.0.7, 3.1.5, or later.
  • Check Fedora and Debian package changelogs for CVE-2019-14463 coverage.
  • Confirm whether any affected service accepts external or untrusted Modbus traffic.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

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CVE-2019-14463 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

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.

0CVSS vectors
0Timeline events
0ADP providers
6Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.