CVE-2026-25823

CRITICAL EPSS 49.4%
Published Mar 13, 20263mo ago · Modified Apr 27, 20262mo ago
9.8 CVSS 3.1
Critical
Find Similar
Published Mar 13, 2026 3mo ago
Last Modified Apr 27, 2026 2mo ago

Description

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.

CVSS Details

Base Score
9.8
Exploitability
3.9
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
49.4% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-121

References 2

  • hmsnetworks.blob.core.windows.net 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
  • hms-networks.com https://www.hms-networks.com/p/flexy20500-00ma-ewon-flexy-205

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.