CVE-2026-25823 Memory corruption in n/a
Unauthenticated attackers can trigger a stack buffer overflow in HMS Networks Ewon Flexy and Cosy+ devices, leading to remote code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-25823?
CVE-2026-25823 is a critical memory corruption vulnerability in n/a, published on 12 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-121
Which versions are affected by CVE-2026-25823?
How do I fix CVE-2026-25823?
No fix has been published for CVE-2026-25823 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-25823 being exploited?
There is no known exploitation of CVE-2026-25823 in the wild and no public exploit code.
Sources
Also known as GHSA-7p64-f72w-3rpr.