How severe is CVE-2022-4856?

CVE-2022-4856 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2022-4856 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-4856?

CVE-2022-4856 affects Modbustools Modbus Slave. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-4856?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-4856 published?

CVE-2022-4856 was published on 2022-12-30 and last updated on 2026-06-17.

CVE-2022-4856

CVE-2022-4856 is a medium-severity vulnerability in Modbustools Modbus Slave with a CVSS 3.x base score of 6.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: Medium (CVSS 3.x base score 6.3)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Modbustools Modbus Slave
Published: 2022-12-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2022-4856?: 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.
How severe is CVE-2022-4856?: CVE-2022-4856 has a CVSS 3.x base score of 6.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2022-4856 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-4856?: CVE-2022-4856 affects Modbustools Modbus Slave. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-4856?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-4856 published?: CVE-2022-4856 was published on 2022-12-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:modbustools:modbus_slave:*:*:*:*:*:*:*:*

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