CVE-2026-25817 - Vulnerability Analysis

Overview

HMS Networks Ewon Flexy < 15.0s4, Cosy+ 22.xx < 22.1s6, and Cosy+ 23.xx < 23.0s3 contain a command injection caused by improper neutralization of special elements in OS commands, letting attackers with low privilege credentials execute code remotely.

Severity & Score

Impact

Attackers with low privilege credentials can execute arbitrary code remotely, potentially compromising the gateway.

Mitigation

Update to firmware 15.0s4 for Flexy, 22.1s6 for Cosy+ 22.xx, and 23.0s3 for Cosy+ 23.xx or later.

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

Related Resources

• Vulnerability Intelligence Dashboard
• Credential Scanner