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Vulnerability record · CVE-2022-4856 · published 30 December 2022

CVE-2022-4856: Modbustools modbus slave classic buffer overflow vulnerability

Modbustools · Modbus Slave

A vulnerability has been found in Modbus Tools Modbus Slave up to 7.5.1 and classified as critical. Affected by this vulnerability is an unknown functionality of the file mbslave.exe of the component mbs File Handler. The manipulation leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-217021 was assigned to this vulnerability.

7.8 CVSS 3.1 High EPSS 0.59% · top 54.0% CWE-120 · Classic buffer overflow
7.8CVSS 3.1 base score
0.59%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

A vulnerability has been found in Modbus Tools Modbus Slave up to 7.5.1 and classified as critical. Affected by this vulnerability is an unknown functionality of the file mbslave.exe of the component mbs File Handler. The manipulation leads to buffer overflow. The attack can be launched remotely. The exploit has been disclosed to the public and may be used. The identifier VDB-217021 was assigned to this vulnerability.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Durian1546/vul/blob/main/webray.com.cn/Modbus%20Slave/Modbus%20Slave%20(version%207.5.1%20and%20earli ExploitPatchThird Party Advisory
https://github.com/Durian1546/vul/blob/main/webray.com.cn/Modbus%20Slave/poc/poc.mbs Third Party Advisory
https://vuldb.com/?ctiid.217021 Third Party Advisory
https://vuldb.com/?id.217021 Third Party Advisory
https://github.com/Durian1546/vul/blob/main/webray.com.cn/Modbus%20Slave/Modbus%20Slave%20(version%207.5.1%20and%20earli ExploitPatchThird Party Advisory
https://github.com/Durian1546/vul/blob/main/webray.com.cn/Modbus%20Slave/poc/poc.mbs Third Party Advisory
https://vuldb.com/?ctiid.217021 Third Party Advisory
https://vuldb.com/?id.217021 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-4856), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.