CVE-2025-23018

IPv4-in-IPv6 and IPv6-in-IPv6 tunneling (RFC 2473) do not require the validation or verification of the source of a network packet, allowing an attacker to spoof and route arbitrary traffic via an exposed network interface. This is a similar issue to CVE-2020-10136.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
5.4 MEDIUM
NETWORK
HIGH
NONE
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
mitreCNA
5.4 MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
CISA-ADPADP
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Base Score
CVSS 3.x
EPSS Score
Percentile: 17%
VendorProductVersion
ietfipv6
-
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://datatracker.ietf.org/doc/html/rfc2473
https://papers.mathyvanhoef.com/usenix2025-tunnels.pdf
https://www.top10vpn.com/research/tunneling-protocol-vulnerability/