CVE-2023-22308: Softether VPN

High severity, CVSS 7.5. EPSS: 0.7% chance of exploitation in the next 30 days.

An integer underflow vulnerability exists in the vpnserver OvsProcessData functionality of SoftEther VPN 5.01.9674 and 5.02. A specially crafted network packet can lead to denial of service. An attacker can send a malicious packet to trigger this vulnerability.

Affected products

• Softether VPN: version 5.01.9674 only; version 5.02 only

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