CVE-2024-33895

MEDIUM

Ewon Cosy+ Firmware 21.x < 21.2s10 and 22.x < 22.1s3 - Use of Hard-coded Credentials

Title source: llm

Description

Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 use a unique key to encrypt the configuration parameters. This is fixed in version 21.2s10 and 22.1s3, the key is now unique per device.

References (5)

Core 5

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

Vendor Advisory

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

Mailing List

http://seclists.org/fulldisclosure/2024/Aug/22

Scores

CVSS v3 6.6

EPSS 0.0050

EPSS Percentile 38.7%

Attack Vector PHYSICAL

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-798

Status published

Products (1)

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

Published Aug 02, 2024

Tracked Since Feb 18, 2026