HIGH
CVE-2023-5909
CWE-297Published: November 30, 2023· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
KEPServerEX does not properly validate certificates from clients which may allow unauthenticated users to connect.
Technical Analysis
CVE-2023-5909 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
ge1 product(s)
industrial gateway server
ptc5 product(s)
keepserverexopc-aggregatorthingworx industrial connectivitythingworx kepware edgethingworx kepware server
rockwellautomation1 product(s)
kepserver enterprise
softwaretoolbox1 product(s)
top server
Source: NVD CPE · 8 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (2)
→
https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03Third Party Advisory · US Government Resource
→
https://www.cisa.gov/news-events/ics-advisories/icsa-23-334-03Third Party Advisory · US Government Resource
Quick Facts
CVE IDCVE-2023-5909
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-297
CISA KEVNo
Affected4 vendor(s)
PublishedNov 30, 2023
Related CVEs (CWE-297)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2023-5909 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.