Vulnerability · Published Aug 5, 2025 · Assigned by GitHub_M
CVE-2025-54870VTun-ng's failure to initialize encryption modules may cause reversion to plaintext
High 8.7
In plain English
A high-severity security flaw in vtun-ng from leakingmemory. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 4.0)8.7High
Exploit odds (30 days)0.2%top 86.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| leakingmemory | vtun-ng | >= 3.0.12, < 3.0.18 |
Weakness: CWE-636 · 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