Vulnerability Intelligence Report
Improper Validation of Certificate with Host Mismatch in PTC KEPServerEx
CVE-2023-5909
KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
No Active Exploit Signals
CVSS Base Score
7.5
HIGH
Exploitability:3.9
Impact Score:3.6
EPSS Probability:0.44%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
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Authentication
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Weaponization
—
SSVC Action
—
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| No affected products specified. | ||
Threat Intelligence Signals
EPSS Score
0.442%
GitHub Advisory
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Cybersecurity and Infrastructure Security Agency (CISA) Industrial Control Systems (ICS) · CERT · USA |
| Reserved | 2023-11-01T16:18:45 |
| Published | 2023-11-30T22:05:59 |
| Last Updated | 2026-02-25T17:20:07 |
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