PatchTheCVECVE-2023-5909: KEPServerEX does not properly validate certificates from clients which may allow unauthenticated user
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HIGH 7.5REMOTEUPGRADEUPGRADEUPGRADE
CVE-2023-5909 is a high-severity flaw (CVSS 7.5) affecting industrial gateway server, keepserverex, opc-aggregator. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
Why this priority
- High severity
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
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
ge industrial gateway server UPGRADE
Affected: <= 7.614
Fixed in: newer than 7.614
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy industrial-gateway-server || rpm -q industrial-gateway-server || industrial-gateway-server --version
2. UPGRADE to newer than 7.614 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade industrial-gateway-server
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade industrial-gateway-server
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
ptc keepserverex UPGRADE
Affected: <= 6.14.263.0
Fixed in: newer than 6.14.263.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy keepserverex || rpm -q keepserverex || keepserverex --version
2. UPGRADE to newer than 6.14.263.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade keepserverex
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade keepserverex
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
ptc opc-aggregator UPGRADE
Affected: <= 6.14
Fixed in: newer than 6.14
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy opc-aggregator || rpm -q opc-aggregator || opc-aggregator --version
2. UPGRADE to newer than 6.14 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade opc-aggregator
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade opc-aggregator
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
ptc thingworx industrial connectivity MITIGATE
Affected: all versions
Fixed in: no fixed release known
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy thingworx-industrial-connectivity || rpm -q thingworx-industrial-connectivity || thingworx-industrial-connectivity --version
No fixed or unaffected release known
Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.
ptc thingworx kepware edge UPGRADE
Affected: <= 1.7
Fixed in: newer than 1.7
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy thingworx-kepware-edge || rpm -q thingworx-kepware-edge || thingworx-kepware-edge --version
2. UPGRADE to newer than 1.7 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade thingworx-kepware-edge
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade thingworx-kepware-edge
Note
Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.
ptc thingworx kepware server UPGRADE
Affected: <= 6.14.263.0
Fixed in: newer than 6.14.263.0
Safe to downgrade to: no unaffected older release
1. Check installed version
apt-cache policy thingworx-kepware-server || rpm -q thingworx-kepware-server || thingworx-kepware-server --version
2. UPGRADE to newer than 6.14.263.0 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade thingworx-kepware-server
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade thingworx-kepware-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.
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-2023-5909?
industrial gateway server: upgrade to newer than 7.614; keepserverex: upgrade to newer than 6.14.263.0; opc-aggregator: upgrade to newer than 6.14. Exact commands for each OS are on this page.
Is CVE-2023-5909 being exploited?
CVE-2023-5909 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-2023-5909 affect?
CVE-2023-5909 affects industrial gateway server, keepserverex, opc-aggregator. Severity is high (CVSS 7.5). KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
How urgent is CVE-2023-5909?
Priority 41/100. High severity; Remotely exploitable, no login, no user action
Related CVEs
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- CVE-2022-2848 CRITICAL 9.1 UPGRADE UPGRADE This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kepware KEPS
- CVE-2022-2825 CRITICAL 9.8 UPGRADE UPGRADE This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kepware KEPS
- CVE-2020-27267 CRITICAL 9.1 DOWNGRADE DOWNGRADE KEPServerEX v6.0 to v6.9, ThingWorx Kepware Server v6.8 and v6.9, ThingWorx Industrial Connectivity (all versi
- CVE-2020-27265 CRITICAL 9.8 DOWNGRADE DOWNGRADE KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial Connectivity: All ver