CVE-2026-25818 Weak cryptography in n/a
Weak entropy in authentication cookies allows attackers to recover user passwords via brute-force, leading to account takeover on HMS Networks devices.
- 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-2026-25818?
CVE-2026-25818 is a critical 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 weak entropy for authentication cookies, allowing an attacker with a stolen session cookie to find the user password by brute-forcing an encryption parameter.
Weakness: CWE-315
Which versions are affected by CVE-2026-25818?
How do I fix CVE-2026-25818?
No fix has been published for CVE-2026-25818 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-25818 being exploited?
There is no known exploitation of CVE-2026-25818 in the wild and no public exploit code.
Sources
Also known as GHSA-278p-xrjq-m6gf.