CVE-2023-5909

highpriority · track · 30EPSS 0.004 · 38 %ileEURUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.44% (38th) EPSS

CVSS 7.5 · high

Is it mine?

39 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · fstec_bdu · cisa_csaf_ot

EPSS · scored 2026-10-27

KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedKEPServerEXcisa_csaf_ot
KEPServerEX should upgrade to v6.15 or later
FixedOPC-Aggregatorcisa_csaf_ot
OPC-Aggregator should upgrade to v6.15 or later
FixedThingWorx Industrial Connectivitycisa_csaf_ot
ThingWorx Industrial Connectivity should upgrade to ThingWorx Kepware Server v6.15 or later
FixedThingWorx Kepware Edgecisa_csaf_ot
ThingWorx Kepware Edge: Upgrade to v1.8 or later
FixedThingWorx Kepware Servercisa_csaf_ot
ThingWorx Industrial Connectivity should upgrade to ThingWorx Kepware Server v6.15 or later
MitigationGE Digital Industrial Gateway Servercisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationKEPServerEXcisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationOPC-Aggregatorcisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationRockwell Automation KEPServer Enterprisecisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationSoftware Toolbox TOP Servercisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationThingWorx Industrial Connectivitycisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationThingWorx Kepware Edgecisa_csaf_ot
PTC has released and recommends users to update to the following versions:
MitigationThingWorx Kepware Servercisa_csaf_ot
PTC has released and recommends users to update to the following versions:

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 6.9–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · CISA US

v3.17.5highAV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · FSTEC (BDU) RU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ENISA EU

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:Nsecondary · ics-cert@hq.dhs.gov USexploitability 3.9 · impact 3.6

v3.16.9mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: yes · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-295USprimaryCWE-295USCWE-297USCWE-297USCWE-297US

affected products (39)

Products and version ranges known to be affected.

GE Digital Industrial Gateway Server: <=v7.614all versionscisa_csaf_otUS
KEPServerEX: <=v6.14.263.0all versionscisa_csaf_otUS
OPC-Aggregator: <=v6.14all versionscisa_csaf_otUS
Rockwell Automation KEPServer Enterprise: <=v6.14.263.0all versionscisa_csaf_otUS
Software Toolbox TOP Server: <=v6.14.263.0all versionscisa_csaf_otUS
ThingWorx Industrial Connectivity: vers:all/*all versionscisa_csaf_otUS
ThingWorx Kepware Edge: <=v1.7all versionscisa_csaf_otUS
ThingWorx Kepware Server: <=v6.14.263.0all versionscisa_csaf_otUS
PTC GE Digital Industrial Gateway Server≤ v7.614cisa_csaf_otUS
PTC KEPServerEX≤ v6.14.263.0cisa_csaf_otUS
PTC OPC-Aggregator≤ v6.14cisa_csaf_otUS
PTC Rockwell Automation KEPServer Enterprise≤ v6.14.263.0cisa_csaf_otUS
PTC Software Toolbox TOP Server≤ v6.14.263.0cisa_csaf_otUS
PTC ThingWorx Industrial Connectivity≤ vers:all/*cisa_csaf_otUS
PTC ThingWorx Kepware Edge≤ v1.7cisa_csaf_otUS
PTC ThingWorx Kepware Server≤ v6.14.263.0cisa_csaf_otUS
Industrial Gateway Server≤ 0 ≤7.614enisa_euvdEU
KEPServer Enterprise≤ 0 ≤6.14.263.0enisa_euvdEU
KEPServerEX≤ 0 ≤6.14.263.0enisa_euvdEU
OPC-Aggregator≤ 0 ≤6.14enisa_euvdEU

showing 20 of 39

advisories (1)

Vendor and ecosystem advisories describing this.

ICSA-23-334-03PTC KEPServerEx2023-11-30icsa · cisa_csaf_otUS
Successful exploitation of these vulnerabilities could allow an attacker gaining Windows SYSTEM-level code execution on the service host and may cause the product to crash, leak sensitive information, or connect to the product without proper authentication.

also known as (5)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu cisa_csaf_ot NVD CVE.org MITRE

published 2023-11-30modified 2026-06-17

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+1889 more

references (5)

External citations — patches, advisories, analysis.

scry

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