VTun-ng's failure to initialize encryption modules may cause reversion to plaintext
Priority MEDIUM 43CWE-636Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
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.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00227 13th percentileScored 2026-11-07
Fix Fixed vtun-ng (leakingmemory): 3.0.18
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| leakingmemory | vtun-ng | 3.0.12 to before 3.0.18 | 3.0.18 | Patch available | CNA |
- vtun-ng Vendorleakingmemory Affected 3.0.12 to before 3.0.18 Fixed in 3.0.18 Patch available CNA
Remediation
- Fix · CNA vtun-ng (leakingmemory) Fixed in 3.0.18
Timeline
- 2026-10-02 Threatist record created from CVE-2025-54870
References
Sources
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences