CVE-2023-26793

CRITICALNVD 9.89.8—Elevated

9.8

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

CVSS v3: 9.8
EG Score: 9.8(medium)
EPSS: 75.9%
KEV: Not listed

Published

May 1, 2024

Last Modified

May 5, 2025

References (2)

cve@mitrehttps://github.com/stephane/libmodbus/issues/683
af854a3a-2127-422b-91ae-364da2661108https://github.com/stephane/libmodbus/issues/683

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-122Heap-based Buffer Overflow

Data Freshness Timeline

(refreshed 12× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

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Frequently asked(5)

What is CVE-2023-26793?

CVE-2023-26793 is a critical vulnerability published on May 1, 2024. libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in readiostatus function in src/modbus.c.

When was CVE-2023-26793 disclosed?

CVE-2023-26793 was first published in the National Vulnerability Database on May 1, 2024, with the most recent update on May 5, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2023-26793 actively exploited?

CVE-2023-26793 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2023-26793?

CVE-2023-26793 has a CVSS v3 base score of 9.8 (NVD).

How do I remediate CVE-2023-26793?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-26793, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2023-26793

📅 Published

🔄 Last Modified

🔗 References (2)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2023-26793?

🔗 Related CVEs(same CWE)

Same CWE

Published

Last Modified

References (2)

Frequently asked(5)

Related CVEs(same CWE)