CVE-2020-5622: Shadan-Kun Server Security Type

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

Shadankun Server Security Type (excluding normal blocking method types) Ver.1.5.3 and earlier allows remote attackers to cause a denial of service which may result in not being able to add newly detected attack source IP addresses as blocking targets for about 10 minutes via a specially crafted request.

Affected products

• Shadan-Kun Server Security Type: up to and including 1.5.3

Published 2020-09-02. Last modified 2026-06-17.