CVE-2002-1697: Vtun Project Vtun

High severity, CVSS 7.5. EPSS: 0.8% chance of exploitation in the next 30 days.

Electronic Code Book (ECB) mode in VTun 2.0 through 2.5 uses a weak encryption algorithm that produces the same ciphertext from the same plaintext blocks, which could allow remote attackers to gain sensitive information.

Affected products

• Vtun Project Vtun: from 2.0, up to and including 2.5

Published 2002-12-31. Last modified 2026-06-16.