CVE-2025-25565 Memory corruption in n/a

Critical 9.8 Published 12 Mar 2025 Updated 19 Jul 2025

A buffer overflow in SoftEther VPN command-line tools could allow code execution, though the vendor disputes exploitability as it requires local user interaction.

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

What is CVE-2025-25565?

CVE-2025-25565 is a critical memory corruption vulnerability in n/a, published on 12 Mar 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

SoftEther VPN 5.02.5187 is vulnerable to Buffer Overflow in the Command.c file via the PtMakeCert and PtMakeCert2048 functions. NOTE: the Supplier disputes this because the behavior only allows a user to attack himself by typing a long string on a command line.

Weakness: CWE-120

Which versions are affected by CVE-2025-25565?

It affects 1 product.

Products include Softether Vpn.

How do I fix CVE-2025-25565?

No fix has been published for CVE-2025-25565 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-25565 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-25565 exists.

Sources

Also known as GHSA-pg35-89w5-5c5h.