CVE-2026-25819
Received Received - Intake
Denial of Service in HMS Networks Ewon Flexy and Cosy+ GUI

Publication date: 2026-03-13

Last updated on: 2026-03-13

Assigner: MITRE

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 allows unauthenticated attackers to cause a Denial of Service by using a specially crafted HTTP request that leads to a reboot of the device, provided they have access to the device's GUI.
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Meta Information
Published
2026-03-13
Last Modified
2026-03-13
Generated
2026-06-16
AI Q&A
2026-03-13
EPSS Evaluated
2026-06-15
NVD
CVE-2026-25819
EUVD
EUVD-2026-11713
Affected Vendors & Products
Showing 3 associated CPEs
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
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KEV
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CWE ID Description
CWE-400 The product does not properly control the allocation and maintenance of a limited resource.
Attack-Flow Graph
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Executive Summary

This vulnerability affects HMS Networks Ewon Flexy and Cosy+ devices with certain firmware versions. It allows unauthenticated attackers to send a specially crafted HTTP request to the device's GUI, which causes the device to reboot unexpectedly.

Impact Analysis

The impact of this vulnerability is a Denial of Service (DoS) condition. An attacker can cause the affected device to reboot repeatedly, disrupting its normal operation and potentially causing downtime or loss of availability for systems relying on the device.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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