What is CVE-2024-33894?

CVE-2024-33894 is a high-severity vulnerability in Hms-Networks Ewon Cosy\+ 4g Apac, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2024-08-02.

How severe is CVE-2024-33894?

High severity. CVSS v3 base score is 8.8 out of 10.

Privilege escalation in Hms-Networks Ewon Cosy\+ 4g Apac

CVE-2024-33894

Insecure Permission vulnerability in Cosy+ devices running a firmware 21.x below 21.2s10 or a firmware 22.x below 22.1s3 are executing several processes with elevated privileges.

Vulnerability class: Privilege Escalation

Published 2024-08-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.008 (56.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 56th percentile — 56.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

www.ewon.biz/products/cosy/ewon-cosy-wifi (Product)
www.hms-networks.com/cyber-security (Vendor Advisory)
hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurit… (Vendor Advisory)
blog.syss.com/posts/hacking-a-secure-industrial-remote-access-gateway/ (Exploit, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108 (Exploit, Mailing List)

Frequently asked questions

What is CVE-2024-33894?: CVE-2024-33894 is a high-severity vulnerability in Hms-Networks Ewon Cosy\+ 4g Apac, classified under Improper Privilege Management. CVSS score: 8.8/10. Published 2024-08-02.
How severe is CVE-2024-33894?: High severity. CVSS v3 base score is 8.8 out of 10.