CVE-2025-54870

VTun-ng's failure to initialize encryption modules may cause reversion to plaintext

Published Aug 5, 2025 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-23579 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.
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Leakingmemory
Leakingmemory vtun-ng
Rust-lang
Rust-lang vtun-ng
Vendors & Products Leakingmemory
Leakingmemory vtun-ng
Rust-lang
Rust-lang vtun-ng
Type Values Removed Values Added
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.
Title VTun-ng's failure to initialize encryption modules may cause reversion to plaintext
Weaknesses CWE-636
References
Metrics cvssV4_0

{'score': 8.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Aug 5, 2025, 2:56 PM
Reserved
Jul 31, 2025, 5:23 PM
Status
Deferred
Published
Aug 5, 2025, 1:15 AM
Modified
Jun 17, 2026, 9:40 AM