Medium severity · published Jan 14, 2025
CVE-2025-23019
IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface
6.5
CVSS
1%
EPSS
No
On KEV
Description
IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IP
Ipv6 · Ietf
All versions, or not specified · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-23019
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-23019
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/
www.kb.cert.org
https://www.kb.cert.org/vuls/id/199397
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