CVE-2023-31192 Information disclosure in SoftEther VPN

Medium 5.3 Published 12 Oct 2023 Updated 4 Nov 2025

A man-in-the-middle attacker can trigger an information disclosure vulnerability in SoftEther VPN ClientConnect functionality, exposing sensitive data.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2023-31192?

CVE-2023-31192 is a medium-severity vulnerability in SoftEther VPN, published on 12 Oct 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

An information disclosure vulnerability exists in the ClientConnect() functionality of SoftEther VPN 5.01.9674. A specially crafted network packet can lead to a disclosure of sensitive information. An attacker can perform a man-in-the-middle attack to trigger this vulnerability.

Weakness: CWE-908, CWE-457

Which versions are affected by CVE-2023-31192?

It affects 1 product.

Products include Softether Vpn.

How do I fix CVE-2023-31192?

No fix has been published for CVE-2023-31192 yet. Limit exposure of the affected software until one is available.

Is CVE-2023-31192 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2023-31192 exists.

Sources

Also known as GHSA-jqqc-vv26-h55v.