CVE-2022-4857: A vulnerability was found in Modbus Tools Modbus Poll up to 9.10.0 and classified as critical

Q: How do I fix CVE-2022-4857?

modbus poll: upgrade to newer than 9.10.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-4857 being exploited?

CVE-2022-4857 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2022-4857 affect?

CVE-2022-4857 affects modbus poll. Severity is medium (CVSS 6.3). A vulnerability was found in Modbus Tools Modbus Poll up to 9.10.0 and classified as critical. Affected by this issue is some unknown functionality of the file mbpoll.exe of the component mbp File Handler. The manipulation leads to buffer o

Q: How urgent is CVE-2022-4857?

Priority 40/100. Public exploit reference

This month

MEDIUM 6.3UPGRADE

CVE-2022-4857 is a medium-severity flaw (CVSS 6.3) affecting modbus poll. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability was found in Modbus Tools Modbus Poll up to 9.10.0 and classified as critical. Affected by this issue is some unknown functionality of the file mbpoll.exe of the component mbp File Handler. The manipulation leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used. VDB-217022 is the identifier assigned to this vulnerability.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-120
Published	2022-12-30
Last modified	2026-06-17

Publisher (CNA): VulDB · Vendor: modbustools

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2022-12-30 10:15 UTCPublished CVE record published
2026-06-17 05:22 UTCUpdated Record last modified

modbustools modbus poll UPGRADE

Affected: <= 9.10.0

Fixed in: newer than 9.10.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy modbus-poll || rpm -q modbus-poll || modbus-poll --version

2. UPGRADE to newer than 9.10.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade modbus-poll

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade modbus-poll

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2022-4857?

modbus poll: upgrade to newer than 9.10.0. Exact commands for each OS are on this page.

Is CVE-2022-4857 being exploited?

CVE-2022-4857 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2022-4857 affect?

CVE-2022-4857 affects modbus poll. Severity is medium (CVSS 6.3). A vulnerability was found in Modbus Tools Modbus Poll up to 9.10.0 and classified as critical. Affected by this issue is some unknown functionality of the file mbpoll.exe of the component mbp File Handler. The manipulation leads to buffer o

How urgent is CVE-2022-4857?

Priority 40/100. Public exploit reference

References

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