VulnerabilityModified
CVE-2025-23019
IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.
MEDIUM 6.5EPSS 0.99%
Does this matter?
Lower severity and a low EPSS score (0.99%). Track it; it rarely justifies an emergency change on its own.
Description
IPv6-in-IPv4 tunneling (RFC 4213) allows an attacker to spoof and route traffic via an exposed network interface.
- CVSS 3.1
- 6.5 MEDIUMCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:L
- EPSS
- 0.99% probability · 62th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-940
- Affected
- ietf/ipv6
- Source
- cve@mitre.org
EPSS 1.0% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://datatracker.ietf.org/doc/html/rfc4213Technical Description
- https://papers.mathyvanhoef.com/usenix2025-tunnels.pdfTechnical Description
- https://www.top10vpn.com/research/tunneling-protocol-vulnerability/Technical Description
- https://www.kb.cert.org/vuls/id/199397
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.