HMS Networks Ewon Flexy (firmware before 15.0s4) and Cosy+ (firmware 22.xx before 22.1s6, 23.xx before 23.0s3) devices are vulnerable to CVE-2026-25818, a critical flaw stemming from weak entropy in authentication cookies. This allows an attacker with a stolen session cookie to brute-force an encryption parameter to discover the user's password. Rated 9.1 CVSS (Critical), this vulnerability has a network attack vector with low complexity, requiring no user interaction, and could lead to high impact on confidentiality and integrity. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
| N/A | N/A | n/aCNA affected |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.