Medium severity5.4NVD Advisory· Published Jan 14, 2025· Updated Jun 17, 2026

CVE-2025-23018

Description

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Ietf/Ipv62 versions
cpe:2.3:a:ietf:ipv6:-:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:a:ietf:ipv6:-:*:*:*:*:*:*:*
- (no CPE)range: 6
Ietf/RFC 2473llm-create

Patches

Vulnerability mechanics

References

datatracker.ietf.org/doc/html/rfc2473nvdTechnical Description
papers.mathyvanhoef.com/usenix2025-tunnels.pdfnvdTechnical Description
www.top10vpn.com/research/tunneling-protocol-vulnerability/nvdTechnical Description
www.kb.cert.org/vuls/id/199397nvd

News mentions

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cvss	0.351
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000