High (7.5) in openbsd openssh. EPSS 17% chance of exploitation in the next 30 days.
The default configuration of OpenSSH through 6.1 enforces a fixed time limit between establishing a TCP connection and completing a login, which makes it easier for remote attackers to cause a denial of service (connection-slot exhaustion) by periodically making many new TCP connections.
Severity
CVSS 3.1
7.5 high
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS
17% chance of exploitation in the next 30 days; higher than 97% of CVEs (scores of 2026-10-31)