CVE-2025-54870

8.7 highEPSS 0.2%

High (8.7). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 4.0

8.7 high

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 11% of CVEs (scores of 2026-10-31)
CWE: CWE-636
Published: 2025-08-05
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

References

https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140
https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf

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