CVE-2025-54870 HIGH

CVE-2025-54870: VTun-ng's failure to initialize encryption modules may cause reversion to plaintext

Vendor Leakingmemory
Product vtun-ng
Weakness CWE-636
Published August 5, 2025
Last update August 5, 2025
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

VTun-ng is a Virtual Tunnel over TCP/IP network. In versions 3.0.17 and below, failure to initialize encryption modules might cause reversion to plaintext due to insufficient error handling. The bug was first introduced in VTun-ng version 3.0.12. This is fixed in version 3.0.18. To workaround this issue, avoid blowfish-256.

Key dates

02Disclosure timeline

August 5, 2025 CVE published
August 5, 2025 Record updated