What’s Vulnerable › Vulnerabilities

CVE-2023-5376: TFTP Without Authentication

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-01-09 · updated 2026-06-17
• Weakness: CWE-306

Description

An Improper Authentication vulnerability in Korenix JetNet TFTP allows abuse of this service. This issue affects JetNet devices older than firmware version 2024/01.

Affected products

• Korenix Jetnet 4508-W Firmware: 2.3
• Korenix Jetnet 4508 Firmware: 2.3
• Korenix Jetnet 4508F-M Firmware: 2.3
• Korenix Jetnet 4508F-Mw Firmware: 2.3
• Korenix Jetnet 4508F-S Firmware: 2.3
• Korenix Jetnet 4508F-Sw Firmware: 2.3
• Korenix Jetnet 4508I-W Firmware: 1.3
• Korenix Jetnet 4508If-M Firmware: 1.3
• Korenix Jetnet 4508If-Mw Firmware: 1.3
• Korenix Jetnet 4508If-S Firmware: 1.3
• Korenix Jetnet 4508If-Sw Firmware: 1.3
• Korenix Jetnet 5310G Firmware: 2.6
• Korenix Jetnet 5612G-4F Firmware: 1.2
• Korenix Jetnet 5612Gp-4F Firmware: 1.2
• Korenix Jetnet 5620G-4C Firmware: 1.1
• Korenix Jetnet 5728G-24P-Ac-2Dc-Eu Firmware: 2.1
• Korenix Jetnet 5728G-24P-Ac-2Dc-Us Firmware: 2.1
• Korenix Jetnet 6528Gf-2Ac-Eu Firmware: 1.0
• Korenix Jetnet 6528Gf-2Ac-Us Firmware: 1.0
• Korenix Jetnet 6528Gf-2Dc24 Firmware: 1.0
• Korenix Jetnet 6528Gf-2Dc48 Firmware: 1.0
• Korenix Jetnet 6528Gf-Ac-Eu Firmware: 1.0
• Korenix Jetnet 6528Gf-Ac-Us Firmware: 1.0
• Korenix Jetnet 6628X-4F-Eu Firmware: 1.0
• Korenix Jetnet 6628Xp-4F-Us Firmware: 1.1
• Korenix Jetnet 6728G-24P-Ac-2Dc-Eu Firmware: 1.1
• Korenix Jetnet 6728G-24P-Ac-2Dc-Us Firmware: 1.1
• Korenix Jetnet 6828Gf-2Ac-Au Firmware: 1.0
• Korenix Jetnet 6828Gf-2Ac-Eu Firmware: 1.0
• Korenix Jetnet 6828Gf-2Ac-Us Firmware: 1.0

References

• http://packetstormsecurity.com/files/176550/Korenix-JetNet-Series-Unauthenticated-Access.html
• http://seclists.org/fulldisclosure/2024/Jan/11
• https://cyberdanube.com/en/en-multiple-vulnerabilities-in-korenix-jetnet-series/
• https://www.beijerelectronics.com/en/support/Help___online?docId=69947
• http://packetstormsecurity.com/files/176550/Korenix-JetNet-Series-Unauthenticated-Access.html
• http://seclists.org/fulldisclosure/2024/Jan/11
• https://cyberdanube.com/en/en-multiple-vulnerabilities-in-korenix-jetnet-series/
• https://www.beijerelectronics.com/en/support/Help___online?docId=69947

Get alerted when CVE-2023-5376 or the next vulnerability affects your stack