CVE-2024-33897

CRITICAL

HMS Networks ewon Cosy+ Firmware >=21.0s0 <21.2s10 - Availability Issue via Certificate Signing Request

Title source: llm

Description

A compromised HMS Networks Cosy+ device could be used to request a Certificate Signing Request from Talk2m for another device, resulting in an availability issue. The issue was patched on the Talk2m production server on April 18, 2024.

References (6)

Core 6

Core References

Exploit, Third Party Advisory

https://blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/

Vendor Advisory

https://hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurity/security-advisory/hms-security-advisory-2024-07-29-001--ewon-several-cosy--vulnerabilities.pdf

Product

https://www.ewon.biz/products/cosy/ewon-cosy-wifi

Not Applicable

https://www.hms-networks.com/cyber-security

Mailing List

http://seclists.org/fulldisclosure/2024/Aug/24

Mailing List

http://seclists.org/fulldisclosure/2024/Aug/27

Scores

CVSS v3 9.1

EPSS 0.0066

EPSS Percentile 46.5%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable yes

Technical Impact partial

Details

CWE

CWE-425

Status published

Products (1)

hms-networks/ewon_cosy\+_firmware 21.0s0 - 21.2s10

Published Aug 06, 2024

Tracked Since Feb 18, 2026