What is CVE-2026-25818?

CVE-2026-25818 is a critical-severity vulnerability in N/a, classified under CWE-315. CVSS score: 9.1/10. Published 2026-03-13.

How severe is CVE-2026-25818?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in N/a

CVE-2026-25818

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 fi…

EPSS: 0.001 (4.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

N/a — versions n/a

Weakness classification (CWE)

CWE-315

References

cve@mitre.org
cve@mitre.org

Frequently asked questions

What is CVE-2026-25818?: CVE-2026-25818 is a critical-severity vulnerability in N/a, classified under CWE-315. CVSS score: 9.1/10. Published 2026-03-13.
How severe is CVE-2026-25818?: Critical severity. CVSS v3 base score is 9.1 out of 10.