CVE-2026-25823
Stack Buffer Overflow in HMS Networks Ewon Flexy Causes DoS, RCE
Publication date: 2026-03-13
Last updated on: 2026-03-13
Assigner: MITRE
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| hms_networks | ewon_flexy | to 15.0s4 (exc) |
| hms_networks | cosy | to 22.1s6 (exc) |
| hms_networks | cosy | to 23.0s3 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability affects HMS Networks Ewon Flexy and Cosy+ devices with certain firmware versions. It is a stack buffer overflow that can cause a Denial of Service (DoS). Additionally, it can be exploited to achieve Unauthenticated Remote Code Execution, meaning an attacker can run arbitrary code on the device without needing to authenticate.
How can this vulnerability impact me? :
The vulnerability can lead to a Denial of Service, making the affected devices unavailable or unresponsive. More critically, it allows an attacker to execute code remotely without authentication, which can compromise the device's integrity, confidentiality, and availability.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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How can this vulnerability be detected on my network or system? Can you suggest some commands?
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What immediate steps should I take to mitigate this vulnerability?
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