CVE-2025-54870

HIGH

vtun-ng 3.0.12-3.0.17 - Unauthenticated Plaintext Transmission via Encryption Module Initialization Failure

Title source: llm
STIX 2.1

Description

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.

References (2)

Core 2

Scores

CVSS v4 8.7
EPSS 0.0019
EPSS Percentile 9.0%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation none
Automatable yes
Technical Impact partial

Details

CWE
CWE-636
Status published
Products (1)
leakingmemory/vtun-ng >= 3.0.12, < 3.0.18
Published Aug 05, 2025
Tracked Since Feb 18, 2026