CVE-2025-23019: IETF IPv6

Medium severity, CVSS 6.5. EPSS: 1% chance of exploitation in the next 30 days.

IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.

Affected products

• IETF IPv6: affected versions not specified

Published 2025-01-14. Last modified 2026-06-17.