PT-2025-31889 · Vtun-Ng · Vtun-Ng

Leakingmemory · Published 2025-08-05 · Updated 2025-08-05 · CVE-2025-54870

Positive Technologies (AI Summary)

CVSS v4.0

8.7

High

Base vector

AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

Name of the Vulnerable Software and Affected Versions VTun-ng versions 3.0.17 and below

Description VTun-ng, a Virtual Tunnel over TCP/IP network, may revert to plaintext due to insufficient error handling when initializing encryption modules. The issue was introduced in version 3.0.12 and is resolved in version 3.0.18.

Recommendations Update to version 3.0.18 or later. Avoid using blowfish-256.

Exploit

Fix

Weakness Enumeration

CWE-636

Related Identifiers

CVE-2025-54870

GHSA-M3JC-27C6-2WRF

Affected Products

Vtun-Ng

References · 8

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/54xxx/CVE-2025-54870.json · Exploit
• https://osv.dev/vulnerability/CVE-2025-54870 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2025-54870 · Security Note
• https://github.com/leakingmemory/vtun-ng/security/advisories/GHSA-m3jc-27c6-2wrf · Note
• https://github.com/leakingmemory/vtun-ng/commit/8c63982b6c487c52db1d56ab94c266f0bc857140 · Note
• https://twitter.com/CVEnew/status/1952539718043992171 · Twitter Post
• https://t.me/CVEtracker/29158 · Telegram Post
• https://twitter.com/CveFindCom/status/1952537553103438027 · Twitter Post