What is the CVSS score of CVE-2023-5347?

CVE-2023-5347 has a CVSS 3.1 base score of 9.8 (Critical). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.2%.

Which versions of Jetnet 5310G Firmware are affected by CVE-2023-5347?

CVE-2023-5347 presents critical security risk, a broken cryptography vulnerability rated CVSS 9.8.

Is there a public PoC exploit available for CVE-2023-5347?

Yes, a public proof-of-concept exploit is available for CVE-2023-5347. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2023-5347?

Within 24 hours: Identify all affected systems running the update process of Korenix JetNet Series allows replacing and apply vendor patches immediately. Monitor vendor channels for patch availability.

Jetnet 5310G Firmware CVE-2023-5347

CRITICAL

Use of a Broken or Risky Cryptographic Algorithm (CWE-327)

2024-01-09 office@cyberdanube.com

9.8

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

9.8 CRITICAL

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 28, 2026 - 19:34 vuln.today

PoC Detected

Oct 08, 2025 - 09:15 vuln.today

Public exploit code

CVE Published

Jan 09, 2024 - 10:15 nvd

CRITICAL 9.8

DescriptionCVE.org

AnalysisAI

An Improper Verification of Cryptographic Signature vulnerability in the update process of Korenix JetNet Series allows replacing the whole operating system including Trusted Executables. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Technical ContextAI

This vulnerability is classified under CWE-327. An Improper Verification of Cryptographic Signature vulnerability in the update process of Korenix JetNet Series allows replacing the whole operating system including Trusted Executables. Affected products include: Korenix Jetnet 5310G Firmware, Korenix Jetnet 4508 Firmware, Korenix Jetnet 4508I-W Firmware, Korenix Jetnet 4508-W Firmware, Korenix Jetnet 4508If-S Firmware. Version information: version 2024.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.