What’s Vulnerable › Vulnerabilities

CVE-2024-33896

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.0% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2024-08-02 · updated 2026-06-17
• Weakness: CWE-78

Description

Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 are vulnerable to code injection due to improper parameter blacklisting. This is fixed in version 21.2s10 and 22.1s3.

Affected products

• Hms-Networks Ewon Cosy+ Firmware: from 21.0 through 21.2s10; from 22.0 through 22.1s3

References

• https://blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/
• 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
• https://www.ewon.biz/products/cosy/ewon-cosy-wifi
• https://www.hms-networks.com/cyber-security
• http://seclists.org/fulldisclosure/2024/Aug/21

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