{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "579288cc2cd1e6c87f1d65bb8d4b37f8220b3619"
            },
            {
              "fixed": "8c63982b6c487c52db1d56ab94c266f0bc857140"
            }
          ],
          "repo": "https://github.com/leakingmemory/vtun-ng",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-m3jc-27c6-2wrf"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-636"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54870.json"
  },
  "details": "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.",
  "id": "CVE-2025-54870",
  "modified": "2026-04-01T23:08:34.309930366Z",
  "published": "2025-08-05T00:02:38.457Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54870.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54870"
    },
    {
      "type": "FIX",
      "url": "https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140"
    }
  ],
  "schema_version": "1.7.3",
  "severity": [
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "VTun-ng's failure to initialize encryption modules may cause reversion to plaintext"
}