CVE-2025-23019

low-risk
Published 2025-01-14

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

Do I need to act?

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0.06% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.4/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Ipv6

Affected Vendors

Ietf

References (4)

Technical Description https://datatracker.ietf.org/doc/html/rfc4213
Technical Description https://papers.mathyvanhoef.com/usenix2025-tunnels.pdf
Technical Description https://www.top10vpn.com/research/tunneling-protocol-vulnerability/
https://www.kb.cert.org/vuls/id/199397
22
/ 100
low-risk
Severity 17/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal