CVE-2023-23581: Softether VPN

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

A denial-of-service vulnerability exists in the vpnserver EnSafeHttpHeaderValueStr functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service.

Affected products

• Softether VPN: version 5.01.9674 only; version 5.02 only

Published 2023-10-12. Last modified 2026-06-17.