CVE-2023-26793

Name: CVE-2023-26793
Creator: NVD / NIST
Published: 2024-05-01T19:15:21.123+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.73%

Last modified Jun 17, 2026

CVE-2023-26793 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. libmodbus v3.1.10 has a heap-based buffer overflow vulnerability in read_io_status function in src/modbus.c.. EPSS estimates a 0.73% chance of exploitation in the next 30 days.

Description

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

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.73%

49.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-122

Affected Software

Vendor	Product	Versions
Libmodbus	Libmodbus	3.1.10

References

https://github.com/stephane/libmodbus/issues/683Exploit, Issue Tracking, Vendor Advisory
https://github.com/stephane/libmodbus/issues/683Exploit, Issue Tracking, Vendor Advisory

Timeline

Published: May 1, 2024
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2023-26793?

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

How severe is CVE-2023-26793?

CVE-2023-26793 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.73% probability of exploitation in the next 30 days.

How do I fix CVE-2023-26793?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-26793?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST