CVE-2023-26793

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Published May 1, 2024 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed

Description

libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in read_io_status function in src/modbus.c.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:libmodbus:libmodbus:3.1.10:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.728% probability within 30 days)

Exploitation poc

Automatable no

Technical Impact total

References

Link	Providers
https://github.com/stephane/libmodbus/issues/683

History

Feb 25, 2026 7:15 PM Affected versions updated. Scoring metrics updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:libmodbus:libmodbus:3.1.0:::::::*
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

May 5, 2025 5:45 PM First appearance in the feed. Affected versions updated. Affected vendors updated View changes

Type	Values Removed	Values Added
First Time appeared		Libmodbus Libmodbus libmodbus
CPEs		cpe:2.3:a:libmodbus:libmodbus:3.1.10:::::::*
Vendors & Products		Libmodbus Libmodbus libmodbus

Subscriptions

Libmodbus Libmodbus

Weaknesses

CWE-122

Sources

CVE record Updated: Aug 2, 2024, 11:53 AM

Status: PUBLISHED
Assigner: mitre
Published: May 1, 2024, 12:00 AM
Updated: Aug 2, 2024, 11:53 AM
Reserved: Feb 27, 2023, 12:00 AM

View source JSON

Vulnrichment Updated: Aug 2, 2024, 11:53 AM

Updated: Aug 2, 2024, 11:53 AM

NVD Updated: Jun 17, 2026, 5:43 AM

Status: Analyzed
Published: May 1, 2024, 7:15 PM
Modified: Jun 17, 2026, 5:43 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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