CVE-2026-25823

critical · 9.8

HMS Networks Ewon Flexy with firmware before 15.0s4, Cosy+ with firmware 22.xx before 22.1s6, and Cosy+ with firmware 23.xx before 23.0s3 have a stack buffer overflow that leads to a Denial of Service, which can also be exploited to achieve Unauthenticated Remote Code Execution.

9.8

CVSS

0.7%

EPSS (exploit prob.)

53rd

EPSS percentile

2026-03-13

Published

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

Weaknesses

CWE-121

References

https://hmsnetworks.blob.core.windows.net/nlw/docs/default-source/products/cybersecurity/security-advisory/hms-security-advisory-2026-03-09-001---ewon-several-flexy-and-cosy--vulnerabilities.pdf?sfvrsn=f7c027b8_13
https://www.hms-networks.com/p/flexy20500-00ma-ewon-flexy-205

Query this programmatically:

curl https://evil-db.io/api/v1/cve/CVE-2026-25823