CVE-2022-2967: Prosys OPC UA Simulation Server version prior to v5.3.0-64 and UA Modbus Server versions 1.4.18-5 and prior do

Q: How do I fix CVE-2022-2967?

ua modbus server: upgrade to 1.4.20; ua simulation server: upgrade to 5.4.0. Exact commands for each OS are on this page.

Q: Is CVE-2022-2967 being exploited?

CVE-2022-2967 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-2022-2967 affect?

CVE-2022-2967 affects ua modbus server, ua simulation server. Severity is medium (CVSS 6.5). Prosys OPC UA Simulation Server version prior to v5.3.0-64 and UA Modbus Server versions 1.4.18-5 and prior do not sufficiently protect credentials, which could allow an attacker to obtain user credentials and gain access to system data.

Q: How urgent is CVE-2022-2967?

Priority 32/100. No elevated risk signals yet.

Routine

MEDIUM 6.5UPGRADEUPGRADE

CVE-2022-2967 is a medium-severity flaw (CVSS 6.5) affecting ua modbus server, ua simulation server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Prosys OPC UA Simulation Server version prior to v5.3.0-64 and UA Modbus Server versions 1.4.18-5 and prior do not sufficiently protect credentials, which could allow an attacker to obtain user credentials and gain access to system data.

Why this priority

No elevated risk signals yet

A fixed release or distro patch exists.

Risk facts

CVSS score	6.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	High
User interaction	Required
EPSS exploit chance	0.4% (top 64%)
CISA exploited list	No
Weakness	CWE-522
Published	2023-01-03
Last modified	2026-06-17

Publisher (CNA): ICS-CERT · Vendor: prosysopc

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

Am I affected?

Timeline

2023-01-03 22:15 UTCPublished CVE record published
2026-06-17 04:42 UTCUpdated Record last modified

prosysopc ua modbus server UPGRADE

Affected: < 1.4.20

Fixed in: 1.4.20

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ua-modbus-server || rpm -q ua-modbus-server || ua-modbus-server --version

2. UPGRADE to 1.4.20 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ua-modbus-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ua-modbus-server

Note

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

prosysopc ua simulation server UPGRADE

Affected: < 5.4.0

Fixed in: 5.4.0

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ua-simulation-server || rpm -q ua-simulation-server || ua-simulation-server --version

2. UPGRADE to 5.4.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ua-simulation-server

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ua-simulation-server

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-2022-2967?

ua modbus server: upgrade to 1.4.20; ua simulation server: upgrade to 5.4.0. Exact commands for each OS are on this page.

Is CVE-2022-2967 being exploited?

CVE-2022-2967 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-2022-2967 affect?

CVE-2022-2967 affects ua modbus server, ua simulation server. Severity is medium (CVSS 6.5). Prosys OPC UA Simulation Server version prior to v5.3.0-64 and UA Modbus Server versions 1.4.18-5 and prior do not sufficiently protect credentials, which could allow an attacker to obtain user credentials and gain access to system data.

How urgent is CVE-2022-2967?

Priority 32/100. No elevated risk signals yet.

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References

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