How severe is CVE-2023-5909?

CVE-2023-5909 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2023-5909 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-5909?

CVE-2023-5909 primarily affects Ge Industrial Gateway Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2023-5909?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-5909 published?

CVE-2023-5909 was published on 2023-11-30 and last updated on 2026-06-17.

CVE-2023-5909

CVE-2023-5909 is a high-severity vulnerability in Ge Industrial Gateway Server with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-295.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-295
Affected product: Ge Industrial Gateway Server
Published: 2023-11-30
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-5909?: KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
How severe is CVE-2023-5909?: CVE-2023-5909 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2023-5909 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-5909?: CVE-2023-5909 primarily affects Ge Industrial Gateway Server. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2023-5909?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-5909 published?: CVE-2023-5909 was published on 2023-11-30 and last updated on 2026-06-17.

References

https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03

Affected products (8)

cpe:2.3:a:ge:industrial_gateway_server:*:*:*:*:*:*:*:*
cpe:2.3:a:ptc:keepserverex:*:*:*:*:*:*:*:*
cpe:2.3:a:ptc:opc-aggregator:*:*:*:*:*:*:*:*
cpe:2.3:a:ptc:thingworx_industrial_connectivity:-:*:*:*:*:*:*:*
cpe:2.3:a:ptc:thingworx_kepware_edge:*:*:*:*:*:*:*:*
cpe:2.3:a:ptc:thingworx_kepware_server:*:*:*:*:*:*:*:*
cpe:2.3:a:rockwellautomation:kepserver_enterprise:*:*:*:*:*:*:*:*
cpe:2.3:a:softwaretoolbox:top_server:*:*:*:*:*:*:*:*

More vulnerabilities in Ge Industrial Gateway Server

CVE-2022-2825 — Critical (CVSS 9.8): This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kepware KEPServerEX…
CVE-2020-27265 — Critical (CVSS 9.8): KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial Connectivity: All versions,…
CVE-2023-5908 — Critical (CVSS 9.1): KEPServerEX is vulnerable to a buffer overflow which may allow an attacker to crash the product being accessed or leak…
CVE-2022-2848 — Critical (CVSS 9.1): This vulnerability allows remote attackers to execute arbitrary code on affected installations of Kepware KEPServerEX…
CVE-2020-27267 — Critical (CVSS 9.1): KEPServerEX v6.0 to v6.9, ThingWorx Kepware Server v6.8 and v6.9, ThingWorx Industrial Connectivity (all versions),…
CVE-2020-27263 — Critical (CVSS 9.1): KEPServerEX: v6.0 to v6.9, ThingWorx Kepware Server: v6.8 and v6.9, ThingWorx Industrial Connectivity: All versions,…

All CVEs affecting Ge Industrial Gateway Server →

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