CVE-2021-3304

9.8 criticalEPSS 1.6%

Critical (9.8) in sagemcom f\@st 3686 firmware. EPSS 1.6% chance of exploitation in the next 30 days.

Sagemcom F@ST 3686 v2 3.495 devices have a buffer overflow via a long sessionKey to the goform/login URI.

Severity

9.8 critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 1.6% chance of exploitation in the next 30 days; higher than 76% of CVEs (scores of 2026-10-31)
CWE: CWE-120
Published: 2021-01-26
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19