PatchTheCVECVE-2022-31805: In the CODESYS Development System multiple components in multiple versions transmit the passwords for the comm
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HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE
CVE-2022-31805 is a high-severity flaw (CVSS 7.5) affecting development system, edge gateway, gateway. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
In the CODESYS Development System multiple components in multiple versions transmit the passwords for the communication between clients and servers unprotected.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 7.5 (High) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 1.0% (top 36%) |
| CISA exploited list | No |
| Weakness | CWE-523 |
| Published | 2022-06-24 |
| Last modified | 2026-06-17 |
Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
codesys development system UPGRADE
Affected: < 2.3.9.69
Fixed in: 2.3.9.69
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy development-system || rpm -q development-system || development-system --version
2. UPGRADE to 2.3.9.69 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade development-system
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade development-system
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
codesys edge gateway UPGRADE
Affected: < 3.5.18.30
Fixed in: 3.5.18.30
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy edge-gateway || rpm -q edge-gateway || edge-gateway --version
2. UPGRADE to 3.5.18.30 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade edge-gateway
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade edge-gateway
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
codesys gateway UPGRADE
Affected: < 2.3.9.38
Fixed in: 2.3.9.38
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy gateway || rpm -q gateway || gateway --version
2. UPGRADE to 2.3.9.38 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade gateway
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade gateway
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
codesys hmi sl UPGRADE
Affected: < 3.5.18.30
Fixed in: 3.5.18.30
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy hmi-sl || rpm -q hmi-sl || hmi-sl --version
2. UPGRADE to 3.5.18.30 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade hmi-sl
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade hmi-sl
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
codesys opc server UPGRADE
Affected: < 3.5.18.30
Fixed in: 3.5.18.30
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy opc-server || rpm -q opc-server || opc-server --version
2. UPGRADE to 3.5.18.30 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade opc-server
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade opc-server
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
codesys plchandler UPGRADE
Affected: < 3.5.18.30
Fixed in: 3.5.18.30
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy plchandler || rpm -q plchandler || plchandler --version
2. UPGRADE to 3.5.18.30 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade plchandler
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade plchandler
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.
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-2022-31805?
development system: upgrade to 2.3.9.69; edge gateway: upgrade to 3.5.18.30; gateway: upgrade to 2.3.9.38. Exact commands for each OS are on this page.
Is CVE-2022-31805 being exploited?
CVE-2022-31805 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-2022-31805 affect?
CVE-2022-31805 affects development system, edge gateway, gateway. Severity is high (CVSS 7.5). In the CODESYS Development System multiple components in multiple versions transmit the passwords for the communication between clients and servers unprotected.
How urgent is CVE-2022-31805?
Priority 47/100. High severity; Remotely exploitable, no login, no user action
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